US20100144788A1 - 4- [2- (4-methylphenylsulfanyd-phenyl] piperidine with combined serotonin and norepinephrine reuptake inhibition for the treatment of adhd, melancholia, treatment resistent depression or residual symptoms in depression - Google Patents

4- [2- (4-methylphenylsulfanyd-phenyl] piperidine with combined serotonin and norepinephrine reuptake inhibition for the treatment of adhd, melancholia, treatment resistent depression or residual symptoms in depression Download PDF

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US20100144788A1
US20100144788A1 US12/528,440 US52844008A US2010144788A1 US 20100144788 A1 US20100144788 A1 US 20100144788A1 US 52844008 A US52844008 A US 52844008A US 2010144788 A1 US2010144788 A1 US 2010144788A1
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compound
treatment
acid
depression
addition salt
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Tine Bryan Stensbol
Silke Miller
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H Lundbeck AS
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H Lundbeck AS
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
    • A61K31/44—Non condensed pyridines; Hydrogenated derivatives thereof
    • A61K31/445—Non condensed piperidines, e.g. piperocaine
    • A61K31/4465—Non condensed piperidines, e.g. piperocaine only substituted in position 4
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
    • A61K31/44—Non condensed pyridines; Hydrogenated derivatives thereof
    • A61K31/445—Non condensed piperidines, e.g. piperocaine
    • A61K31/451—Non condensed piperidines, e.g. piperocaine having a carbocyclic group directly attached to the heterocyclic ring, e.g. glutethimide, meperidine, loperamide, phencyclidine, piminodine
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/14—Drugs for disorders of the nervous system for treating abnormal movements, e.g. chorea, dyskinesia
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/22—Anxiolytics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/24—Antidepressants
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/28—Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D211/00—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
    • C07D211/04—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D211/06—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members
    • C07D211/08—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hydrocarbon or substituted hydrocarbon radicals directly attached to ring carbon atoms
    • C07D211/18—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hydrocarbon or substituted hydrocarbon radicals directly attached to ring carbon atoms with substituted hydrocarbon radicals attached to ring carbon atoms
    • C07D211/20—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hydrocarbon or substituted hydrocarbon radicals directly attached to ring carbon atoms with substituted hydrocarbon radicals attached to ring carbon atoms with hydrocarbon radicals, substituted by singly bound oxygen or sulphur atoms

Definitions

  • the compound 4-[2-(4-methylphenylsulfanyl)phenyl]piperidine is disclosed in the international patent application WO 03/029232.
  • the compound is said to be an inhibitor of the serotonin transporter, to have affinity for the serotonin receptor 2C (5-HT 2C ), and as such be useful if the treatment of mood disorders, such as major depression and anxiety.
  • said compound is endowed with a broader pharmacological profile, which makes the compound useful in the treatment of other diseases as well—treatments for which there is a desire.
  • This pharmacological profile is also disclosed in WO 07/144,006 together with the use of said compound in the treatment of additional diseases.
  • the invention relates to a method for the treatment of ADHD, melancholia, treatment resistant depression or residual symptoms in depression, the method comprising the administration of a therapeutically effective amount of 4-[2-(4-methylphenylsulfanyl)phenyl]piperidine and acid additions salts thereof (compound I) to a patient in need thereof.
  • the invention relates to the use of 4-[2-(4-methylphenylsulfanyl)phenyl]piperidine and acid additions salts thereof (compound I) in the manufacture of a medicament for the treatment of for the treatment of ADHD, melancholia, treatment resistant depression or residual symptoms in depression.
  • the invention relates to 4-[2-(4-methylphenylsulfanyl)-phenyl]piperidine and acid additions salts thereof (compound I) for use in the treatment of ADHD, melancholia, treatment resistant depression or residual symptoms in depression.
  • FIG. 1 X-ray diffraction pattern of the HBr addition salt of compound I
  • FIG. 2 X-ray diffraction pattern of the HBr addition salt solvate of compound I
  • FIG. 3 X-ray diffraction pattern of the palmitic acid addition salt of compound I
  • FIG. 4 X-ray diffraction pattern of the DL-lactic acid addition salt of compound I
  • FIG. 5 X-ray diffraction pattern of the adipic acid addition salt (1:1) of compound I ( ⁇ + ⁇ form)
  • FIG. 6 X-ray diffraction pattern of the adipic acid addition salt (2:1) of compound I
  • FIG. 7 X-ray diffraction pattern of the fumaric acid addition salt (1:1) of compound I.
  • FIG. 8 X-ray diffraction pattern of the glutaric acid addition salt (1:1) of compound I.
  • FIG. 9 X-ray diffraction pattern of the malonic acid addition salt (1:1) of compound I, ⁇ -form
  • FIG. 10 X-ray diffraction pattern of the malonic acid addition salt of compound I, ⁇ -form
  • FIG. 11 X-ray diffraction pattern of the oxalic acid addition salt (1:1) of compound I
  • FIG. 12 X-ray diffraction pattern of the sebacoinic acid addition salt (2:1) of compound I
  • FIG. 13 X-ray diffraction pattern of the succinic acid addition salt (2:1) of compound I
  • FIG. 14 X-ray diffraction pattern of the L-malic acid addition salt (1:1) of compound I, ⁇ -form
  • FIG. 15 X-ray diffraction pattern of the L-malic acid addition salt (1:1) of compound I, ⁇ -form
  • FIG. 16 X-ray diffraction pattern of the D-tartaric acid addition salt (1:1) of compound I
  • FIG. 17 X-ray diffraction pattern of the L-aspartic acid addition salt (1:1) of compound I in mixture with L-aspartic acid
  • FIG. 18 X-ray diffraction pattern of the L-aspartic acid addition salt hydrate (1:1) of compound I in mixture with L-aspartic acid
  • FIG. 19 X-ray diffraction pattern of the glutamic acid addition salt (1:1) of compound I in mixture with glutamic acid monohydrate
  • FIG. 20 X-ray diffraction pattern of the citric acid addition salt (2:1) of compound I
  • FIG. 21 X-ray diffraction pattern of the HCl acid addition salt of compound I
  • FIG. 22 X-ray diffraction pattern of the phosphoric acid addition salt (1:1) of compound I
  • FIG. 23 Dopamine levels in prefrontal cortex upon administration of compound I.
  • FIG. 24 Acetylcholine levels in prefrontal cortex upon administration of compound I.
  • FIG. 25 a+b Acetylcholine levels in the prefrontal cortex and ventral hippocampus upon administration of compound I.
  • FIG. 26 Effect of compound I on attention-deficits and impulsivity 1 SHR rats.
  • the present invention relates to the use of compound I, which is 4-[2-(4-methylphenylsulfanyl)-phenyl]piperidine and pharmaceutically acceptable salts thereof.
  • compound I which is 4-[2-(4-methylphenylsulfanyl)-phenyl]piperidine and pharmaceutically acceptable salts thereof.
  • the structure of 4-[2-(4-methylphenylsulfanyl)-phenyl]piperidine is
  • the pharmacological profile of compound I is depicted in the examples, but can be summarised as follows.
  • the compound inhibits the serotonin and norepinephrine reuptake; it inhibits the serotonin receptors 2A, 2C and 3; and it inhibits the ⁇ -1 adrenergic receptor.
  • said acid addition salts are salts of acids that are non-toxic.
  • Said salts include salts made from organic acids, such as maleic, fumaric, benzoic, ascorbic, succinic, oxalic, bis-methylenesalicylic, methanesulfonic, ethanedisulfonic, acetic, propionic, tartaric, salicylic, citric, gluconic, lactic, malic, malonic, mandelic, cinnamic, citraconic, aspartic, stearic, palmitic, itaconic, glycolic, p-aminobenzoic, glutamic, benzenesulfonic, theophylline acetic acids, as well as the 8-halotheophyllines, for example 8-bromotheophylline.
  • Said salts may also be made from inorganic salts, such as hydrobromic, sulfuric, sulfamic, phosphoric and nitric acids
  • compound I is the HBr addition salt
  • compound I is the DL-lactic acid addition salt, and in particular the 1:1 salt.
  • compound I is the L-aspartic acid addition salt, and in particular the 1:1 salt.
  • compound I is the glutamic acid addition salt, and in particular the 1:1 salt.
  • compound I is the glutaric acid addition salt, and in particular the 1:1 salt.
  • compound I is the malonic acid addition salt, and in particular the 1:1 salt that is found to exist in two polymorphic modifications ⁇ and ⁇ of which the ⁇ form is believed to be the most stable based on a lower solubility.
  • compound I is in a purified form.
  • purified form is intended to indicate that the compound is essentially free of other compounds or other forms, i.e. polymorphs of said compound, as the case may be.
  • Oral dosage forms and in particular tablets and capsules, are often preferred by the patients and the medical practitioner due to the ease of administration and the consequently better compliance.
  • the active ingredients are crystalline.
  • compound I is crystalline.
  • Crystals used in the present invention may exist as solvates, i.e. crystals wherein solvent molecules form part of the crystal structure.
  • the solvate may be formed from water, in which case the solvates are often referred to as hydrates.
  • the solvates may be formed from other solvents, such as e.g. ethanol, acetone, or ethyl acetate.
  • the exact amount of solvate often depends on the conditions. For instance, hydrates will typically loose water as the temperature is increased or as the relative humidity is decreased. Compounds, which do not change or which change only little when conditions, such as e.g. humidity change are generally regarded as better suited for pharmaceutical formulations. It is noted that the HBr acid addition salt does not form hydrates when precipitated from water whereas compounds such as the succinate, malate and tatrate acid addition salts do.
  • Some compounds are hygroscopic, i.e. they absorb water when exposed to humidity.
  • Hygroscopicity is generally regarded as an undesired property for compounds, which are to be presented in a pharmaceutical formulation, in particular in a dry formulations, such as tablets or capsules.
  • the invention provides crystals with low hygroscopicity.
  • the term “well-defined” in particular means that the stoichiometry is well-defined, i.e. that the ratio between the ions forming the salt is the ratio between small integers, such as 1:1, 1:2, 2:1, 1:1:1, etc.
  • the compounds of the present invention are well-defined crystals.
  • the solubility of an active ingredient is also of significance for the choice of dosage form as it may have a direct impact on bio-availability.
  • a higher solubility of the active ingredient is generally believed to be beneficial as it increases the bio-availability.
  • Some patients, e.g. elderly patients may have difficulties swallowing tablets, and oral drop solutions may be a suitable alternative avoiding the need for swallowing tablets.
  • oral drop solutions may be a suitable alternative avoiding the need for swallowing tablets.
  • DL-lactic acid, L-aspartic acid, glutamic acid, glutaric acid and malonic acid addition salts have exceptionally high solubility.
  • Crystal forms impact the filtration and processing properties of a compound. Needle formed crystals tend to be more difficult to handle in a production environment as filtration becomes more difficult and time consuming.
  • the exact crystal form of a given salt may depend e.g. on the conditions under which the salt was precipitated.
  • the HBr acid addition salt of compound I grows needle-shaped, solvated crystals when precipitated from ethanol, acetic acid and propanol, but crystals of a non-hydrated form, which are not needle-shaped, when HBr addition salt is precipitated from water, providing superior filtration properties.
  • Table 3 also depicts the Resulting pH, i.e. the pH in the saturated solution of the salt. This property is of importance because moisture can never be completely avoided during storage and the accumulation of moisture will give rise to a pH decrease in or on a tablet comprising a low Resulting pH salt, which may decrease shell life. Moreover, a salt with a low resulting pH may give rise to corrosion of process equipment if tablets are made by wet granulation.
  • the data in table 3 suggest that the HBr, HCl and adipic acid addition salts may be superior in this respect.
  • compound I is the HBr addition salt in a crystalline form, in particular in a purified form.
  • said HBr salt has peaks in an X-ray powder diffractogram (XRPD) at approximately 6.08°, 14.81°, 19.26° and 25.38° 2 ⁇ , and in particular said HBr salt has an XRPD as depicted in FIG. 1 .
  • XRPD X-ray powder diffractogram
  • compound I is the DL-lactic acid addition salt (1:1) in a crystalline form, in particular in a purified form.
  • said DL-lactic acid addition salt has peaks in a XRPD at approximately 5.30°, 8.81°, 9.44° and 17.24° 2 ⁇ , and in particular said DL lactic acid addition salt has an XRPD as depicted in FIG. 4 .
  • compound I is the L-aspartic acid addition salt (1:1) in a crystalline form, in particular in a purified form.
  • said L-aspartic acid addition salt is unsolvated and has peaks in a XRPD at approximately 11.05°, 20.16°, 20.60°, 25.00° 2 ⁇ , and in particular said L-aspartic salt, when mixed with L-aspartic acid, has an XRPD as depicted in FIG. 17 .
  • said L-aspartic acid addition salt is a hydrate, in particular in a purified form.
  • said L-aspartic acid addition salt hydrate has peaks in a XRPD at approximately 7.80°, 13.80°, 14.10°, 19.63° 2 ⁇ , and in particular said L-aspartic addition salt hydrate, when mixed with L-aspartic acid, has an XRPD as depicted in FIG. 18 .
  • compound I is the glutamic acid addition salt (1:1) in a crystalline form, in particular in a purified form.
  • said glutamic acid addition salt has peaks in a XRPD at approximately 7.71°, 14.01°, 19.26°, 22.57° 2 ⁇ , and in particular said glutamic acid salt, when mixed with glutamic acid monohydrate, has an XRPD as depicted in FIG. 19 .
  • compound I is the malonic acid addition salt (1:1) in a crystalline form, in particular in a purified form.
  • said malonic acid addition salt is the ⁇ -form and has peaks in a XRPD at approximately 10.77°, 16.70°, 19.93°, 24.01° 2 ⁇
  • said malonic acid addition salt is the 13-form and has peaks in a XRPD at approximately 6.08°, 10.11°, 18.25°, 20.26° 2 ⁇ and in particular said malonic acid addition salt has an XRPD as depicted in FIG. 9 or 10 .
  • compound I is the glutaric acid addition salt (1:1) in a crystalline form, in particular in a purified form.
  • said glutaric acid addition salt has peaks in a XRPD at approximately 9.39°, 11.70°, 14.05°, and 14.58° 2 ⁇ , and in particular said glutaric acid addition salt has an XRPD as depicted in FIG. 8 .
  • 5-HT 2C receptors are located e.g. on dopaminergic neurons where activation exerts a tonic inhibitory influence on the dopamine release, and 5-HT 2C antagonists will effect an increase in the dopamine level.
  • Data presented in example 2E show that compound I does, in deed, bring about a dose dependent increase in the extra cellular dopamine levels in the prefrontal cortex.
  • 5-HT 2C antagonists are particular well-suited for the treatment of depression which is refractory to the treatment with selective serotonin reuptake inhibitors [ Psychopharmacol. Bull., 39, 147-166, 2006].
  • Mirtazapine is also a 5-HT 2 and a 5-HT 3 antagonist, which indicates that compounds exerting serotonin reuptake inhibition in combination with 5-HT 2 and 5-HT 3 antagonism, such as compound I is useful for the treatment of TRD, i.e. will increase the remission rate for patients suffering from treatment resistant depression.
  • a segment of depressed patients will respond to treatment with antidepressants, such as e.g. SSRI's in the sense that they will improve on clinically relevant depression scales, such as MADRD and HAMD, but where other symptoms, such as sleep disturbances and cognitive impairment remain. In the present context, these patients are referred to as partial responders. Due to the above-discussed effects on the acetylcholine levels, the compounds of the present invention are expected to be useful in the treatment of the cognitive impairment in addition to the depression. Clinical studies have shown that the compound prazosin, which is an ⁇ -1 adrenergic receptor antagonist reduces sleep disturbances [ Biol. Psychiatry, 61, 928-934, 2007].
  • 5-HT 2A and 5-HT 2C antagonism of the compounds of the present invention are also believed to have a sedative, sleep-improving effect [ Neuropharmacol, 33, 467-471, 1994] wherefore compound I is useful for the treatment of partial responders, or rephrased that treatment of depressed patients with compound I will reduce the fraction of partial responders.
  • ADHD Attention deficit hyperactivity disorder
  • ADHD is one of the most common neurobehavioral disorders. ADHD is characterised by the presence of a triad of social and communicative impairments with restricted, repetitive or stereotyped behaviours. ADHD usually starts in childhood or adolescence, but symptoms may continue into adulthood.
  • Atomoxetine is currently the only nonstimulant approved by FDA for the treatment of ADHD [ Drugs, 64, 205-222, 2004].
  • Atomoxctinc is a norepinephrine reuptake inhibitor, which also brings about in increase in the dopamine level in the pre-frontal cortex. It has been suggested that the increase in the level of said neurotransmitters mediates the therapeutic effect of atomoxetine in the treatment of ADHD [ Eur.
  • Melancholia is a particular subtype of depression often connected to severe depression; this type of depression is also referred to as melancholic depression. Melancholia is associated with anxiety, dread of the future, insomnia, and loss of appetite. Compounds that inhibit both the serotonin and the norepinephrine reuptake, such as e.g. venlafaxine, have been shown to be particular effective in the treatment of patients with severe depression and melancholia [ Depres. Anxiety, 12, 50-54, 2000]. As discussed above, compounds exerting 5-HT 2C antagonism increase the dopamine level, wherefore such compounds would be expected to be effective in the treatment of melancholia [ Psychpharm.
  • the ⁇ -1 adrenergic receptor and 5-HT 2 antagonism of the compounds of the present invention is expected to help normalise sleep, wherefore said compounds are useful in the treatment of melancholia.
  • the invention provides a method for the treatment of ADHD, melancholia, treatment resistant depression or residual symptoms in depression, the method comprising the administration of a therapeutically effective amount of 4-[2-(4-methylphenylsulfanyl)phenyl]piperidine and acid additions salts thereof (compound I) to a patient in need thereof.
  • said patient being treated for any of the above listed diseases has initially been diagnosed with said disease.
  • the compound of the invention is administered in an amount of about 0.001 to about 100 mg/kg body weight per day.
  • a typical oral dosage is in the range of from about 0.001 to about 100 mg/kg body weight per day, preferably from about 0.01 to about 50 mg/kg body weight per day, administered in one or more dosages such as 1 to 3 dosages.
  • the exact dosage will depend upon the frequency and mode of administration, the sex, age, weight and general condition of the subject treated, the nature and severity of the condition treated and any concomitant diseases to be treated and other factors evident to those skilled in the art.
  • a typical oral dosage for adults is in the range of 1-100 mg/day of a compound of the present invention, such as 1-30 mg/day, 5-25 mg/day or 5-60 mg/day. This may typically be achieved by the administration of 0.1-60 mg, such as 0.1-50 mg, 1-25 mg, 1-35 mg, such as 1, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55 or 60 mg of compound I once or twice daily.
  • a “therapeutically effective amount” of a compound as used herein means an amount sufficient to cure, alleviate or partially arrest the clinical manifestations of a given disease and its complications in a therapeutic intervention comprising the administration of said compound.
  • An amount adequate to accomplish this is defined as “therapeutically effective amount”.
  • the term also includes amounts sufficient to cure, alleviate or partially arrest the clinical manifestations of a given disease and its complications in a treatment comprising the administration of said compound. Effective amounts for each purpose will depend on the severity of the disease or injury as well as the weight and general state of the subject. It will be understood that determining an appropriate dosage may be achieved using routine experimentation, by constructing a matrix of values and testing different points in the matrix, which is all within the ordinary skills of a trained physician.
  • treatment means the management and care of a patient for the purpose of combating a condition, such as a disease or a disorder.
  • the term is intended to include the full spectrum of treatments for a given condition from which the patient is suffering, such as administration of the active compound to alleviate the symptoms or complications, to delay the progression of the disease, disorder or condition, to alleviate or relief the symptoms and complications, and/or to cure or eliminate the disease, disorder or condition as well as to prevent the condition, wherein prevention is to be understood as the management and care of a patient for the purpose of combating the disease, condition, or disorder and includes the administration of the active compounds to prevent the onset of the symptoms or complications. Nonetheless, prophylactic (preventive) and therapeutic (curative) treatment are two separate aspect of the invention.
  • the patient to be treated is preferably a mammal, in particular a human being.
  • the invention relates to the use of 4-[2-(4-methylphenylsulfanyl)phenyl]piperidine and acid additions salts thereof (compound I) in the manufacture of a medicament for the treatment of for the treatment of ADHD, melancholia, treatment resistant depression or residual symptoms in depression.
  • the invention relates to 4-[2-(4-methylphenylsulfanyl)-phenyl]piperidine and acid additions salts thereof (compound I) for use in the treatment of ADHD, melancholia, treatment resistant depression or residual symptoms in depression.
  • the compounds of the present invention may be administered alone as a pure compound or in combination with pharmaceutically acceptable carriers or excipients, in either single or multiple doses.
  • the pharmaceutical compositions according to the invention may be formulated with pharmaceutically acceptable carriers or diluents as well as any other known adjuvants and excipients in accordance with conventional techniques such as those disclosed in Remington: The Science and Practice of Pharmacy, 19 Edition, Gennaro, Ed., Mack Publishing Co., Easton, Pa., 1995.
  • compositions may be specifically formulated for administration by any suitable route such as the oral, rectal, nasal, pulmonary, topical (including buccal and sublingual), transdermal, intracisternal, intraperitoneal, vaginal and parenteral (including subcutaneous, intramuscular, intrathecal, intravenous and intradermal) route, the oral route being preferred. It will be appreciated that the preferred route will depend on the general condition and age of the subject to be treated, the nature of the condition to be treated and the active ingredient chosen.
  • compositions for oral administration include solid dosage forms such as capsules, tablets, dragees, pills, lozenges, powders and granules. Where appropriate, they can be prepared with coatings.
  • Liquid dosage forms for oral administration include solutions, emulsions, suspensions, syrups and elixirs.
  • compositions for parenteral administration include sterile aqueous and nonaqueous injectable solutions, dispersions, suspensions or emulsions as well as sterile powders to be reconstituted in sterile injectable solutions or dispersions prior to use.
  • Suitable administration forms include suppositories, sprays, ointments, cremes, gels, inhalants, dermal patches, implants, etc.
  • the compounds of the invention are administered in a unit dosage form containing said compounds in an amount of about 0.1 to 50 mg, such as 1 mg, 5 mg 10 mg, 15 mg, 20 mg, 25 mg, 30 or 35 mg of compound I.
  • parenteral routes such as intravenous, intrathecal, intramuscular and similar administration
  • typically doses are in the order of about half the dose employed for oral administration.
  • solutions of the compound of the invention in sterile aqueous solution aqueous propylene glycol, aqueous vitamin E or sesame or peanut oil may be employed.
  • aqueous solutions should be suitably buffered if necessary and the liquid diluent first rendered isotonic with sufficient saline or glucose.
  • the aqueous solutions are particularly suitable for intravenous, intramuscular, subcutaneous and intraperitoneal administration.
  • the sterile aqueous media employed are all readily available by standard techniques known to those skilled in the art.
  • Suitable pharmaceutical carriers include inert solid diluents or fillers, sterile aqueous solution and various organic solvents.
  • solid carriers are lactose, terra alba, sucrose, cyclodextrin, talc, gelatine, agar, pectin, acacia, magnesium stearate, stearic acid and lower alkyl ethers of cellulose.
  • liquid carriers are syrup, peanut oil, olive oil, phospho lipids, fatty acids, fatty acid amines, polyoxyethylene and water.
  • Formulations of the present invention suitable for oral administration may be presented as discrete units such as capsules or tablets, each containing a predetermined amount of the active ingredient, and which may include a suitable excipient.
  • the orally available formulations may be in the form of a powder or granules, a solution or suspension in an aqueous or non-aqueous liquid, or an oil-in-water or water-in-oil liquid emulsion.
  • the preparation may be tablet, e.g. placed in a hard gelatine capsule in powder or pellet form or in the form of a troche or lozenge.
  • the amount of solid carrier may vary but will usually be from about 25 mg to about 1 g.
  • the preparation may be in the form of a syrup, emulsion, soft gelatine capsule or sterile injectable liquid such as an aqueous or non-aqueous liquid suspension or solution.
  • Tablets may be prepared by mixing the active ingredient with ordinary adjuvants and/or diluents followed by the compression of the mixture in a conventional tabletting machine.
  • adjuvants or diluents comprise: Corn starch, potato starch, talcum, magnesium stearate, gelatine, lactose, gums, and the like. Any other adjuvants or additives usually used for such purposes such as colourings, flavourings, preservatives etc. may be used provided that they are compatible with the active ingredients.
  • Capsules comprising a compound of the present invention may be prepared by mixing a powder comprising said compound with microcrystalline cellulose and magnesium stearate and place said powder in a hard gelatine capsule.
  • said capsule may be coloured by means of a suitable pigment.
  • capsules will comprise 0.25-20% of a compound of the present invention, such as 0.5-1.0%, 3.0-4.0%, 14.0-16.0% of a compound of the present invention.
  • Solutions for injections may be prepared by dissolving the active ingredient and possible additives in a part of the solvent for injection, preferably sterile water, adjusting the solution to the desired volume, sterilising the solution and filling it in suitable ampoules or vials.
  • Any suitable additive conventionally used in the art may be added, such as tonicity agents, preservatives, antioxidants, etc.
  • Compound I may either be administered alone or in combination with another therapeutically active compound, wherein the two compounds may either be administered simultaneously or sequentially.
  • therapeutically active compounds which may advantageously be combined with compound I include sedatives or hypnotics, such as benzodiazepines; anticonvulsants, such as lamotrigine, valproic acid, topiramate, gabapentin, carbamazepine; mood stabilizers such as lithium; dopaminergic drugs, such as dopamine agonists and L-Dopa; drugs to treat ADHD, such as atomoxetine; psychostimulants, such as modafinil, ketamine, methylphenidate and amphetamine; other antidepressants, such as mirtazapine, mianserin and buproprion; hormones, such as T3, estrogen, DHEA and testosterone; atypical antipsychotics, such as olanzapine and aripiprazole; typical antipsychotics, such as haloperidol; drugs to
  • Compound I may be prepared as outlined in WO 2003/029232 or in WO 2007/144006. Different salts may be achieved by addition of an appropriate acid to the free base followed by precipitation. Precipitation may be brought about by e.g. cooling, removal of solvent, addition of another solvent or a mixture thereof.
  • X-Ray powder diffractograms were measured on a PANalytical X'Pert PRO X-Ray Diffractometer using CuK ⁇ 1 radiation. The samples were measured in reflection mode in the 2 ⁇ -range 5-40° using an X' celerator detector. Elemental composition (CHN) was measured on an Elementar Vario EL instrument from Elementar. About 4 mg of sample was used for each measurement, and the results are given as mean values of two measurements.
  • N-methyl-pyrrolidone N-methyl-pyrrolidone
  • NMP 4.5 L
  • 4-Methylbenzenethiol 900 g, 7.25 mol
  • 1,2-dibromobenzene 1709 g, 7.25 mol
  • Potassium tert-butoxide 813 g, 7.25 mol
  • the reaction was exothermic giving a temperature rise of the reaction mixture to 70° C.
  • the reaction mixture was then heated to 120° C. for 2-3 hours.
  • the reaction mixture was cooled to room temperature.
  • Ethyl acetate (4 L) was added and aqueous sodium chloride solution (15%, 2.5 L). The mixture was stirred for 20 minutes.
  • the aqueous phase was separated and extracted with another portion of ethyl acetate (2 L).
  • the aqueous phase was separated and the organic phases were combined and washed with sodium chloride solution (15%, 2.5 L)
  • the organic phase was separated, dried with sodium sulphate and evaporated at reduced pressure to a red oil which contains 20-30% NMP.
  • the oil was diluted to twice the volume with methanol and the mixture was refluxed. More methanol was added until a clear red solution was obtained.
  • the solution was cooled slowly to room temperature while seeded.
  • the product crystallises as off white crystals, they were isolated by filtration and washed with methanol and dried at 40° C. in a vacuum oven until constant weight.
  • Trifluoroacetic acid (2.8 kg, 24.9 mol) and triethylsilane (362 g, 3.1 mol) was charged in a reactor with an efficient stirrer.
  • Ethyl 4-hydroxy-4-(2-(4-tolylsulfanyl)phenyl)-piperidin-1-carboxylate (462 g, 1.24 mol) was added via a powder funnel in portions. The reaction was slightly exothermic. The temperature rose to 50° C. After the addition was finalised the reaction mixture was warmed to 60° C. for 18 hours. The reaction mixture was cooled down to room temperature. Toluene (750 mL) and water (750 mL) was added.
  • the organic phase was isolated and the aqueous phase was extracted with another portion of toluene (750 mL).
  • the organic phases were combined and washed with sodium chloride solution (15%, 500 mL) and dried over sodium sulphate.
  • the sodium sulphate was filtered off, the filtrate evaporated at reduced pressure to a red oil which was processed further in the next step.
  • test compound and rat cortical synaptosome preparation were pre-incubated for 10 min/37° C., and then added [ 3 H]NE or [ 3 H]5-HT (final concentration 10 nM).
  • Non-specific uptake was determined in the presence of 10 ⁇ M talsupram or citalopram and the total uptake was determined in the presence of buffer.
  • Aliquots were incubated for 15 minutes at 37° C. After the incubation [ 3 H]NE or [ 3 H]5-HT taken up by synaptosomes was separated by filtration through Unifilter GF/C, presoaked in 0.1% PEI for 30 minutes, using a Tomtec Cell Harvester program. Filters were washed and counted in a Wallac MicroBeta counter.
  • At NET compound I displays an IC 50 value of 23 nM.
  • At SERT compound I displays an IC 50 value of 8 nM.
  • compound I displays competitive antagonistic properties.
  • the compounds bind to 5-HT 2A receptors with a Ki of ⁇ 100 nM and in a functional assay the compounds antagonise 5-HT evoked release of Ca 2+ from intracellular stores with a Kb of 67 nM.
  • a schild analysis revealed competitive antagonism with a Kb of 100 nM.
  • the experiment was carried out as follows. 2 or 3 days before the experiment CHO cells expressing 250 fmol/mg human 5-HT 2A receptors are plated at a density sufficient to yield a mono-confluent layer on the day of the experiment.
  • the cells are dye loaded (Ca 2+ -kit from Molecular Devices) for 60 minutes at 37° C. in a 5% CO 2 incubator at 95% humidity.
  • Basal fluorescence was monitored in a fluorometric imaging plate reader or FLIPR 384 from Molecular Devices (Sunnyvale, Calif.) with an excitation wavelength of 488 nm and an emission range of 500 to 560 nm. Lacer intensity was set to a suitable level to obtain basal values of approximately 8000-10000 fluorescence units.
  • the variation in basal fluorescence should be less than 10%.
  • EC 50 values are assessed using increasing concentrations of test compound covering at least 3 decades.
  • pA2 values are assessed challenging full dose response curves of 5-HT with four different concentrations of compound (150, 400 1500 and 4000 nM).
  • Kb values were also assessed challenging 2 decades of concentrations of test substances with EC 85 of 5-HT. Test substances are added to the cells 5 minutes before the 5-HT. K i values are calculated using Cheng-Prusoff equation.
  • 5-HT activates currents with an EC 50 of 2600 nM.
  • This current can be antagonised with classical 5-HT 3 antagonists such as ondansetron.
  • Ondansetron displays a Ki value below 1 nM in this system.
  • Compounds of the present invention exhibit potent antagonism in low concentrations (0.1 nM-100 nM) (IC 50 ⁇ 10 nM/Kb ⁇ 2 nM) and agonistic properties when applied in higher concentrations (100-100000 nM) (EC 50 ⁇ 2600 nM) reaching a maximal current of approximately 70-80% of the maximal current elicited by 5-HT itself.
  • 5-HT activates currents with an EC 50 of 3.3 ⁇ M.
  • Oocytes were surgically removed from mature female Xenepus laevis anaesthetized in 0.4% MS-222 for 10-15 min. The oocytes were then digested at room temperature for 2-3 hours with 0.5 mg/ml collagenase (type IA Sigma-Aldrich) in OR2 buffer (82.5 mN NaCl, 2.0 mM KCl, 1.0 mM MgCl2 and 5.0 mM HEPES, pH 7.6).
  • Oocytes avoid of the follicle layer were selected and incubated for 24 hours in Modified Barth's Saline buffer [88 mM NaCl, 1 mM KCl, 15 mM HEPES, 2.4 mM NaHCO 3 , 0.41 mM CaCl 2 , 0.82 mM MgSO 4 , 0.3 mM Ca(NO 3 ) 2 ] supplemented with 2 mM sodium pyruvate, 0.1 U/1 penicillin and 0.1 ⁇ g/l streptomycin.
  • Modified Barth's Saline buffer [88 mM NaCl, 1 mM KCl, 15 mM HEPES, 2.4 mM NaHCO 3 , 0.41 mM CaCl 2 , 0.82 mM MgSO 4 , 0.3 mM Ca(NO 3 ) 2 ] supplemented with 2 mM sodium pyruvate, 0.1 U/1 penicillin and 0.1 ⁇ g/l streptomycin.
  • Stage 1V-1V oocytes were identified and injected with 12-48 n1 of nuclease free water containing 14-50 pg of cRNA coding for human 5-HT3A receptors receptors and incubated at 18° C. until they were used for electrophysiological recordings (1-7 days after injection).
  • Oocytes with expression of human 5-HT3 receptors were placed in a 1 ml bath and perfused with Ringer buffer (115 mM NaCl, 2.5 mM KCl, 10 mM HEPES, 1.8 mM CaCl 2 , 0.1 mM MgCl 2 , pH 7.5).
  • membranes are thawed and homogenized in buffer using an ultra turrax and diluted to the desired concentration (5 ⁇ g/well ⁇ 5 ⁇ g/900 ⁇ l, store on ice until use).
  • the experiment is initiated by mixing of 50 ⁇ l test compound, 50 ⁇ l [ 3 H]-Prazosin and 900 ⁇ l membranes, and the mixture is incubated for 20 minutes at 25° C. Non-specific binding is determined in the presence of 10 ⁇ M WB-4101 and the total binding is determined in the presence of buffer. After the incubation, bound ligand is separated from unbound by filtration through Unifilter GF/B, presoaked in 0.1% PEI for 30 minutes, using a Tomtec Cell Harvester program (D4.2.4). 96 well. Filters are washed 3 times with 1 ml ice-cold buffer, dried at 50° C. and 35 ⁇ l scintillation liquid/well is added to the filters.
  • Bound radioactivity is counted in a Wallac OY 1450 MicroBeta.
  • All cells were cultured in DMEM medium supplemented with 10% BCS, 4 mM L-glutamine (or 2 mM in the case of COS-7), and 100 units/ml penicillin plus 100 ⁇ g/ml streptomycin, at 37° C., in 5% CO2.
  • CHO cells expressing the human alpha 1A-7 receptors were seeded into 384-well black wall microtiter plates coated with poly-D-lysine.
  • Culture medium was aspirated and cells were dye-loaded with 1.5 ⁇ M Fluo-4 in assay buffer composed of Hank's Balanced Salt Solution (138 mM NaCl, 5 mM KCl, 1.3 mM CaCl 2 , 0.5 mM MgCl 2 , 0.4 mM MgSO 4 , 0.3 mM KH 2 PO 4 , 0.3 mM Na 2 HPO 4 , 5.6 mM glucose) plus 20 mM HEPES pH 7.4, 0.05% BSA and 2.5 mM probenicid (50 ⁇ l/well) for 1 hour in 5% CO 2 at 37° C.
  • Hank's Balanced Salt Solution 138 mM NaCl, 5 mM KCl, 1.3 mM CaCl 2 , 0.5 mM MgCl 2 ,
  • the compound of the present invention at 8.9 mg/kg and 18 mg/kg s.c., enhanced the DA levels by approximately 100% and 150%, respectively, above baseline levels as depicted in FIG. 23 . Amounts are calculated as the free base.
  • mice Male Sprague-Dawley rats, initially weighing 275-300 g, were used. The animals were housed under a 12-hr light/dark cycle under controlled conditions for regular in-door temperature (21 ⁇ 2° C.) and humidity (55 ⁇ 5%) with food and tap water available ad libitum.
  • osmotic minipumps Alzet, 2mL1
  • the pumps were filled under aseptic conditions and implanted subcutaneously under sevoflurance anaesthesia. The experiments were carried out with the minipumps on board. Blood samples for measuring plasma levels of the test compound after 3 days of treatment were collected at the end of the experiments.
  • the rats were allowed to recover from surgery for 2 days, housed singly in cages.
  • a microdialysis probe (CMA/12, 0,5 mm diameter, 3 mm length) was inserted through the guide cannula.
  • the probes were connected via a dual channel swivel to a microinjection pump.
  • Perfusion of the microdialysis probe with filtered Ringer solution (145 mm NaCl, 3 mM KCl, 1 mM MgCl 2 , 1,2 mM CaCl 2 ) was begun shortly before insertion of the probe into the brain and continued for the duration of the experiment at a constant flow rate of 1 (1,3) ⁇ L/min.
  • the experiments were initiated. Dialysates were collected every 20 (30) min.
  • the rats were sacrificed by decapitation, their brains removed, frozen and sliced for probe placement verification.
  • Dopamine Mobile phase consisting of 90 mM NaH 2 PO 4 , 50 mM sodium citrate, 367 mg/l sodium 1-octanesulfonic acid, 50 ⁇ M EDTA and 8% acetonitrile (pH 4.0) at a flow rate of 0.5 mL/min. Electrochemical detection was accomplished using a coulometric detector; potential set at 250 mV (guard cell at 350 mV) (Coulochem II, ESA).
  • the experiment was designed to evaluate the effects of compound I on extracellular levels of acetylcholine in the prefrontal cortex of freely-moving rats.
  • Rats Male Wistar rats (280-350 g; Harlan, Zeist, The Netherlands) were used for the experiments. Rats were individually housed in plastic cages (30 ⁇ 30 ⁇ 40 cm) and had ad libitum access to food and water.
  • mice were connected with flexible PEEK tubing to microperfusion pumps (CMA 102), and the dialysis probes were perfused with a Ringer buffer containing 147 mM NaCl, 3.0 mM KCl, 1.2 mM CaCl 2 , and 1.2 mM MgCl 2 , at a flow rate of 1.5 ⁇ L/min.
  • Microdialysis samples were collected at 30 min intervals into mini-vials containing 55 ⁇ L 0.02 M formic acid for determination of acetylcholine. Samples were collected by an automated fraction collector (CMA 142), and stored at ⁇ 80° C. until analyzed.
  • test compound was dissolved in 10% 2-OH-propyl-beta-cyclodextrin and administration occurred by subcutaneous injections of 5 mL/kg volumes in different doses.
  • the LC/MS analyses were performed using a API 4000 MS/MS system consisting of a API 4000 MS/MS detector and a Turbo Ion Spray interface (both from Applied Biosystems, the Netherlands).
  • the acquisitions were performed in positive ionization mode, with ion spray voltage set at 5.5 kV, the nebulizer gas pressure at 50 psig (on a SCIEX scale 0-90) with a probe temperature of 600° C.
  • the instrument was operated in multiple-reaction-monitoring (MRM) mode for detection of acetylcholine (precursor 146.1 Da, product 86.8 Da).
  • MRM multiple-reaction-monitoring
  • the collision energy was 21.0 eV
  • the collision gas (nitrogen) pressure was held at 7 (on a SCIEX scale of 0-12).
  • Data were calibrated and quantitated using the AnalystTM data system (Applied Biosystem, version 1.2).
  • the experiment was designed to evaluate the effects of compound I on extracellular levels of acetylcholine in the prefrontal cortex and ventral hippocampus of freely-moving rats.
  • the animals were housed under a 12-hr light/dark cycle under controlled conditions for regular in-door temperature (21 ⁇ 2° C.) and humidity (55 ⁇ 5%) with food and tap water available ad libitum.
  • Rats were anaesthetised with hypnorm/dormicum (2 ml/kg) and intracerebral guide cannulas (CMA/12) were stereotaxically implanted into the hippocampus, aiming to position the dialysis probe tip in the ventral hippocampus (co-ordinates: 5,6 mm posterior to bregma, lateral ⁇ 5,0 mm, 7,0 mm ventral to dura or in the frontal cortex (co-ordinates: 3,2 mm anterior to bregma; lateral, 0,8 mm; 4,0 mm ventral to dura). Anchor screws and acrylic cement were used for fixation of the guide cannulas. The body temperature of the animals was monitored by rectal probe and maintained at 37° C. The rats were allowed to recover from surgery for 2 days, housed singly in cages. On the day of the experiment a microdialysis probe (CMA/12, 0,5 mm diameter, 3 mm length) was inserted through the guide cannula.
  • the probes were connected via a dual channel swivel to a microinjection pump. Perfusion of the microdialysis probe with filtered Ringer solution (145 mm NaCl, 3 mM KCl, 1 mM MgCl 2 , 1,2 mM CaCl 2 containing 0.5 ⁇ M neostigmine) was begun shortly before insertion of the probe into the brain and continued for the duration of the experiment at a constant flow rate of 1 ⁇ l/min. After 180 min of stabilisation, the experiments were initiated. Dialysates were collected every 20 min. After the experiments the animals were sacrificed, their brains removed, frozen and sliced for probe placement verification.
  • filtered Ringer solution 145 mm NaCl, 3 mM KCl, 1 mM MgCl 2 , 1,2 mM CaCl 2 containing 0.5 ⁇ M neostigmine
  • acetylcholine (ACh) in the dialysates was analysed by means of HPLC with electrochemical detection using a mobile phase consisting of 100 mM disodium hydrogenphosphate, 2.0 mM octane sulfonic acid, 0.5 mM tetramethyl-ammonium chloride and 0.005% MB (ESA), pH 8.0.
  • a pre-column enzyme reactor (ESA) containing immobilised choline oxidase eliminated choline from the injected sample (10 ⁇ l) prior to separation of ACh on the analytical column (ESA ACH-250); flow rate 0.35 ml/min, temperature: 35° C.
  • ESA post-column solid phase reactor
  • SHR Spontaneously hypertensive rats
  • ADHD attention deficit hyperactivity disorder
  • Wistar Kyoto rats the root strain of SHR
  • Hyperactivity was monitored by circadian recording in infra-red cages.
  • SHR and Wistar Kyoto rats did not markedly differ in acquiring the task. Furthermore, the two vehicle groups of SHR and Wistar Kyoto rats showed the same general motivation of food seeking, reflected by an equal number of rewards obtained. SHR rats exhibited a slight attention deficit compared to Wistar Kyoto rats. Impulsiveness was markedly increased in SHR compared with Wistar Kyoto rats and hyperactivity was observed as well.
  • Test groups one group of Wistar Kyoto rats as controls, one group of vehicle-treated SHR (negative control), two groups of intermittently methylphenidate-treated SHR (2 mg/kg and 5 mg/kg i.p, reference groups), one group of SHR treated chronically with methylphenidate via the drinking water (achieved dose: ⁇ 10 mg/kg/day) and two groups of SHR intermittently treated with compound I (5 mg/kg and 10 mg/kg free base).
  • Methylphenidate revealed no consistent effects on operant behaviour; there was no reduction of attention deficit or impulsiveness. Intermittent administration of methylphenidate markedly and dose-dependently aggravated the hyperactivity of SHR. The effect lasted a few hours. Chronic administration did not alter the time course of activity.

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ES2445400T3 (es) 2014-03-03
CN101674830A (zh) 2010-03-17
HK1142007A1 (en) 2010-11-26
PT2139479E (pt) 2013-02-20
BRPI0808831A2 (pt) 2014-08-26
CA2684556A1 (en) 2008-09-25
AR065798A1 (es) 2009-07-01
UA97660C2 (ru) 2012-03-12
CL2008000796A1 (es) 2008-09-26
DK2139479T3 (da) 2013-02-11
US20100137366A1 (en) 2010-06-03
US8507526B2 (en) 2013-08-13
NZ579723A (en) 2011-07-29
KR20090125775A (ko) 2009-12-07
MY163537A (en) 2017-09-15
CA2684556C (en) 2013-01-08
EP2167085A1 (en) 2010-03-31
EA200970871A1 (ru) 2010-04-30
EA017407B1 (ru) 2012-12-28
PL2139479T3 (pl) 2013-05-31
TW200848032A (en) 2008-12-16
ES2399305T3 (es) 2013-03-27
CN101646438B (zh) 2012-04-11
CN101646438A (zh) 2010-02-10
JP5388867B2 (ja) 2014-01-15
SI2139479T1 (sl) 2013-04-30
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IL200954A (en) 2014-12-31
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