Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
  • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
  • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
  • C07D213/24—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with substituted hydrocarbon radicals attached to ring carbon atoms
  • C07D213/28—Radicals substituted by singly-bound oxygen or sulphur atoms
  • C07D213/30—Oxygen atoms
• • 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
  • A61K31/16—Amides, e.g. hydroxamic acids
• • 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
  • A61K31/40—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil
• • 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
• • 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
• • 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
  • A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
• • 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
  • A61K31/535—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one oxygen as the ring hetero atoms, e.g. 1,2-oxazines
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C235/00—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms
  • C07C235/02—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups bound to acyclic carbon atoms and singly-bound oxygen atoms bound to the same carbon skeleton
  • C07C235/32—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups bound to acyclic carbon atoms and singly-bound oxygen atoms bound to the same carbon skeleton the carbon skeleton containing six-membered aromatic rings
  • C07C235/34—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups bound to acyclic carbon atoms and singly-bound oxygen atoms bound to the same carbon skeleton the carbon skeleton containing six-membered aromatic rings having the nitrogen atoms of the carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C235/00—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms
  • C07C235/02—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups bound to acyclic carbon atoms and singly-bound oxygen atoms bound to the same carbon skeleton
  • C07C235/32—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups bound to acyclic carbon atoms and singly-bound oxygen atoms bound to the same carbon skeleton the carbon skeleton containing six-membered aromatic rings
  • C07C235/36—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups bound to acyclic carbon atoms and singly-bound oxygen atoms bound to the same carbon skeleton the carbon skeleton containing six-membered aromatic rings having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a ring other than a six-membered aromatic ring
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D295/00—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms
  • C07D295/16—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms acylated on ring nitrogen atoms
  • C07D295/18—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms acylated on ring nitrogen atoms by radicals derived from carboxylic acids, or sulfur or nitrogen analogues thereof
  • C07D295/182—Radicals derived from carboxylic acids
  • C07D295/185—Radicals derived from carboxylic acids from aliphatic carboxylic acids
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D317/00—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms
  • C07D317/08—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3
  • C07D317/44—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 ortho- or peri-condensed with carbocyclic rings or ring systems
  • C07D317/46—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 ortho- or peri-condensed with carbocyclic rings or ring systems condensed with one six-membered ring
  • C07D317/48—Methylenedioxybenzenes or hydrogenated methylenedioxybenzenes, unsubstituted on the hetero ring
  • C07D317/50—Methylenedioxybenzenes or hydrogenated methylenedioxybenzenes, unsubstituted on the hetero ring with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to atoms of the carbocyclic ring
  • C07D317/60—Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D319/00—Heterocyclic compounds containing six-membered rings having two oxygen atoms as the only ring hetero atoms
  • C07D319/10—1,4-Dioxanes; Hydrogenated 1,4-dioxanes
  • C07D319/14—1,4-Dioxanes; Hydrogenated 1,4-dioxanes condensed with carbocyclic rings or ring systems
  • C07D319/16—1,4-Dioxanes; Hydrogenated 1,4-dioxanes condensed with carbocyclic rings or ring systems condensed with one six-membered ring
  • C07D319/18—Ethylenedioxybenzenes, not substituted on the hetero ring
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C2601/00—Systems containing only non-condensed rings
  • C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
  • C07C2601/14—The ring being saturated

Definitions

• the present invention relates to a dihydrofuran carbamic acid amide derivative and use of the derivative for a pharmaceutical. More specifically, dihydrocaffeic acid, which has the action of inducing the production and secretion of erve growth factor (NGF) in specific tissues in the brain Amide derivatives and their use as active ingredients for preventing and treating central neurodegenerative diseases
• SDAT is a characteristic early symptom of SDAT.
• the direct cause of weakness and disorientation is the progressive degeneration of the macrocellular cholinergic nerve bundles that project from the basal cerebrum to the cerebral cortex and hippocampus, which are the memory and learning centers.
• a number of pathological findings indicating that the function of the dominant region is incomplete have been accumulated.
• acetylcholine biosynthesis precursors or cholinesterase inhibitors are administered to patients with SDAT as an activation treatment for the cholesterol activation system in the brain. Although some improvement in symptoms has been reported after administration, the overall effect has not been as expected.
• NGF has been the subject of numerous studies since its discovery by R. Levi-Monterlcini, S. Gohen, and others, and has already been used to perceive the peripheral nervous system, particularly in the fetal period. Physiological experiments have demonstrated that it is an essential factor in the differentiation and growth of sympathetic nerve cells and the survival and function retention of mature sympathetic nerve cells.
• NGF NGF activity subunit
• ELISA enzymatic-linked immunosorbent assay
• NGF NGF gene is cloned and structurally analyzed, and the complementary DNA (abbreviated as cDNA) of 3—NGF is taken as a probe,
• cDNA complementary DNA
• mRNA A method for quantifying sensation RNA (abbreviated as mRNA) has also been established (referred to as D.L.Shel ton. F. Reichardt: Proc. Natl. Acad. Sci. USA 81 1984 and R. Heumann et al .; EMB0 J. 3, 3183-3189, 1984).
• the rat center especially the hippocampus, the neocortex, the olfactory bulb and the septum of the basal forebrain, the pro-diagonal band, the large cells NGF is also detected in the basal ganglia, but its mRNA content is high in the hippocampus and neocortex, and in the basal septum, other parts of the brain where NGF is not detected. It was revealed that the strength was as low as in the area (S. Korshing et al .: EMB 0 J. 4, 1389-1393. 1985). This fact was subsequently repeated by other research groups (D.L.She 11 : n and L.F.Rei chardt: Proc.
• NGF neurotrophic factor
• the present inventors have been studying the function of NGF as a neurotrophic factor in the central nervous system. Despite the progressive degeneration of the neural flux and the resulting functional dysfunction of the innervation region, this is still due to NGF production / secretion failure in the innervation region. It has led to the standpoint of obtaining a fundamental etiology.
• a compound having NGF functioning as a “neurotrophic factor” for a specific nerve which has the activity of promoting the production and secretion of said innervating tissue, itself or pharmacology
• Modified compounds based on pharmacological considerations can increase the supply of NGF to neurodegenerative local areas through normal administration methods It is hoped that it will be possible to restore the nerve function.
• the use of these compounds is ideal for SDAT, a central disease for which a fundamental therapy has not yet been established.
• these compounds increase the production and secretion of NGF in the cerebral cortex and hippocampus of the central nervous system by administration to the peripheral nervous system.
• a new concept of action based on the plasticity of brain function to prevent the progression of characteristic degeneration of the system and to repair damaged nerve cells or reinstate them by remaining neurons. It is intended to provide timely treatment.
• the present invention firstly relates to the general formula (I) ⁇
• R, and R 2 may be the same or different, but may be different from each other by an atomic atom, an alkyl group of C, ⁇ 4, an aryl group, a butyl group, a benzyl group. Group, a pyridylmethyl group or
• R and R 2 bond to each other to show —CH 2 CH 2 — group and —C— group.
• R 3 each independently represents a hydrogen atom, an alkyl group of C, or a phenyl group.
• A is for cyclo
• R s is a hydrogen atom, an alkyl group of C 6 ,
• R 6 is C, an alkyl group of ⁇ 6, n is an integer of 2 to 7, and X is an oxygen atom or a ⁇ : NR group.
• Is R 7 was or hydrogen atom in this to indicate C, and A Le key Le group 1-4. However, unless R and R 2 in the formula are both hydrogen atoms, they are excluded. )
• R, and R 2 may be the same or different as described above, and the s and the s are the same.
• a NN 7 NR is preferred procedure
• the alkyl group of ⁇ 4 is a methyl group, an ethyl group, a propyl group, an isopropyl group, or a butyl.
• the A Le key Le group C beta of R 5 and R s, main switch group, E Ji group, profile Pi group, blanking switch group, Pen Ji group, the key sheet Le group It is.
• Specific examples of the -N (CH 2 ) n group of A include an aziridyl group, an azetidyl group, and a
• Specific examples include a morpholino group, a piperazinyl group, and a 41-methyl-1-piperazinyl group.
• R and R 2 are arylyl, propargyl, benzyl, pyridylmethyl, or R, R2, etc.
• R and R each independently represent a hydrogen atom, C or an alkyl group of 4 or 4 ; It's was excluding the case as well as R 3 and R 4 Power 5 Ru Oh with water atom.
• Group 1, which is an acid amide derivative and a salt thereof, are represented by the general formula (II).
• A is a cyclic amino group
• R and R 2 / ⁇ are the same, and B is a hydrogen atom, which may be different, but represents an alkyl group of a hydrogen atom.
• A is not a hydrogen atom and A is
• R 5 is a hydrogen atom
• R ⁇ is an alkyl group of ⁇ C 1-6
• R 8 is an alkyl group of C 4 .
• the compound of the present invention may be a pharmacologically acceptable salt, but as such a salt,
• the compound When the compound has an acid group, it may be an alkali metal such as a sodium salt, a potassium salt or a potassium salt. Alkaline earth salts, basic amino salts such as lysine, or suitable organic bases are required.
• a halogenated hydrochloride such as hydrofluoric acid, hydrochloride, hydrobromide, hydroiodide, or nitric acid is used. Salts, perchlorates ..
• Inorganic acid salts such as sulfates and phosphates, methansulfonate, trifluoromensulfonate, and ethane Lower alkylsulfonates such as sulfonates, benzenesulfonates, and p-toluenesulfonates Monosulfonate, fumarate, succinate, citrate, tartrate, oxalate, maleate, and ascorbic acid Organic salts such as salts and acidic amino acids such as glutamate and aspartate can be removed.
• the first method is based on the general formula (Amin) which is thermally condensed with amides corresponding to easily available dihydroxy carboxylate esters.
• R In the structural formula of the derivative of dihydrocafinic acid amide of I), R!
• R 3 Japanese Patent Application Laid-Open No. Hei 2-537067 and Japanese Patent Laid-Open No. Hei 2-152950. This compound is In the presence of R 3 , the general formula -XX-CH 2 CH 2 -X or XCX
• the base is an inorganic base such as sodium hydroxide, sodium hydroxide, sodium carbonate, sodium hydrogencarbonate or the like, or pyridin.
• organic bases such as triethylamine, dimethylamine, sodium methoxide, potassium tert, and butoxide. During the reaction, metallic copper, cupric oxide, or the like may coexist.
• the solvent used is not particularly limited, but may be water, methanol, acetate, benzene, benzene, toluene, tetrahydro, etc. Runs, dimethyl methyl amides, etc., alone or as a mixture are used. In this case, the reaction temperature was 0
• the range of the boiling point of the solvent to be used is preferably from ° C.
• the ) Is usually the former and the latter in a 1: 1 ratio. React at a ratio of 1 to 10 (mol ratio).
• the type of base, reaction conditions, and the like are the same as those described above.
• the reaction product (ester) is thermally condensed with the corresponding amides, or the carboxylic acid obtained by hydrolysis is converted to thiamine chloride. After reacting with phosphorus pentachloride, etc. to form acid chloride, it can be condensed with the corresponding amides, or it can be reacted with carboxylic acid or carboxylic acid Are condensed with various condensing agents.
• thermal refers to heating from room temperature to 200 ° C depending on the case.
• the reaction proceeds in the absence of a solvent in many cases, but in some cases, an excess of the corresponding amine or an inert solvent such as toluene or xylene. May be used.
• various condensing agents are usually used in the field of peptide chemistry such as DCC (silicone mouth carbodiimide) and CDI (carbonyl diimidazole). It is what is used.
• Solvents used here include, but are not limited to, benzene, toluene, xylene, tetrahydrofuran, and the like. 5 Preferably, they may be used alone or in combination. In some cases, an acid such as concentrated sulfuric acid or p-toluenesulfonic acid may be added.
• the reaction temperature is from room temperature to the boiling point of the solvent used, and preferably, the azeotropic temperature of water and the solvent used is good in order to remove formed water.
• N Petite 3 — (2 — Ferrules 1, 3 — Benzoji-kisou 1-6-yl)
• N Petroleum 3 — (3,4-dipyridylmethyl)
• the drug was observed at high concentration for a long time, confirming its usefulness. Furthermore, when the compound of the present invention was orally administered to a rat at 1 to 5 mg / kg, the concentration of NGF in brain tissue was measured. As a result, a remarkable increase in the concentration was observed. NGF levels were detected in the frontal cortex and hippocampus. In addition, in various anti-dementia models using rats, the compounds of the present invention exhibited remarkable anti-dementia effects. From the above, it has been confirmed that the compound of the present invention can be effective as a therapeutic agent for preventing and treating progression of central nervous system degenerative disease, especially for SDAT.
• the compound of the present invention When used as a therapeutic agent for preventing and treating the progression of central nervous system degenerative disease, its dosage and dosage form are naturally dependent on the physical properties of the compound, the symptoms to be administered, and the like.
• 50 to 500 mg per day for an adult should be divided into one or several doses, and tablets, condyles, powders, and suspensions may be obtained.
• ⁇ LOOmg When administered as a suspending agent, capsule, etc., or parenterally::! ⁇ LOOmg can be divided into one or several divided doses and administered, for example, as injections, suppositories, or isotonic solutions for wheel fluids.
• crystalline cellulose, light caustic anhydride, etc. as the adsorbent and corn sorghum as the excipient , Lactose, calcium phosphate, magnesium stearate, and the like.
• an aqueous solution or cotton seed of the compound Oil, corn oil, lacquer oil, oily leaching oil and other suspending aqueous solutions, and surfactants such as HCO-60. Used as an emulsion.
• the amount of the active ingredient contained in the preparation is not particularly limited, but is usually 0.1% to 99% by weight, preferably 1.0 to 50% by weight. .
• a capsule filling machine was used to prepare a capsule.
• N- [3— (3,4-dihydroxyhydrogen) -obtained pionyl] 1-pyrrolidine 0.92 g with 10 m £ N, N— In dimethylformamide, 1.2 g of dibromomethane, 1.2 g of potassium carboxylate and 10 mg of oxidized The mixture was stirred at 130 to 140 ° C for 4 hours with the addition of dicopper. After cooling, it was poured into water and water, extracted with ethyl acetate, washed with water, and dried over sodium sulfate-free.
• Example 12 The same reactions and treatments as in Example 12 were carried out, and Examples 13, 14, 15, 16, 17, and 17, as shown in Table 11, were obtained. The compounds 18 and 19 were obtained.
• 2. Og with 50 m £ of N, N-dimension After dissolving in chloroform, 1.8 g of power tert-butoxide was added under ice-cooling, returned to room temperature, and stirred for 30 minutes. After that, 2.5 g of 3 -chloropyridin was added, stirred for 1 hour, concentrated, dissolved in ethyl acetate, washed with water, and then dried over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure, and the residue was distilled off using a mixed solvent of black hole: methanol 50: 1. Oily N- [3— (3,4-diphenylpyridylmethyl), purified by chromatograph] 1.07 g of pigment was obtained.
• the test compound was orally administered to a 6-week-old rat three times in the morning, the following day, and the next morning, and 4 hours after the final administration, the rat was decapitated with ether narcotics. Immediately after exsanguination, the whole brain was removed. The extracted whole brain is separated on ice-cold dishes into the frontal cortex, septum, hippocampus, striatum, and cerebral cortex. The tube was frozen rapidly with liquid nitrogen and stored frozen at 180 ° C until use. Before use, weigh an appropriate amount of these tissues (about 10 to 50 mg), and then use 2-3% (w / v) for the septum and 5% for other tissues.
• the NGF concentration was measured according to the method of Furukawa et al. (S. Furukawa et al., J- Neurochem. 40, 734-74. 1983). The calibration curve was used with the 3 / 3-NGF standard solution. Table 2 £ 90s / e / ldfJcd
• Rats of male SPF Wistar, 7 months old, weighing 400-500 g were fasted once, and three rats in each group were used for the experiment.
• the administration is forcibly administered at a rate of 20 mgZml / kg using an oral zone, and the plasma is collected for 20 minutes, 1 and 2 hours after administration.
• whole blood was collected from the jugular artery and vein and centrifuged in a heparin-treated test tube.
• the following was determined using the peak area from the calibration curve of the standard product using HPLC.
• the compound according to the present invention is used as an agent for preventing and treating the progression of central neurodegenerative disease.

Landscapes

• Chemical & Material Sciences (AREA)
• Health & Medical Sciences (AREA)
• Organic Chemistry (AREA)
• Animal Behavior & Ethology (AREA)
• Epidemiology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Pharmacology & Pharmacy (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Medicinal Chemistry (AREA)
• Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
• Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=16586174

Family Applications (1)

Country Status (3)

Cited By (1)

Families Citing this family (5)

Citations (3)

Family Cites Families (2)

• 1991
  • 1991-08-08 US US07/847,005 patent/US5338745A/en not_active Expired - Fee Related
  • 1991-08-08 WO PCT/JP1991/001063 patent/WO1992002490A1/ja not_active Ceased
  • 1991-08-08 EP EP91914197A patent/EP0495998A1/en not_active Withdrawn

Patent Citations (3)

Also Published As

Similar Documents

Legal Events