GB2151612A - 2-Amino-1-(methoxyphenyl)-1-ethanol derivatives as medicaments - Google Patents

2-Amino-1-(methoxyphenyl)-1-ethanol derivatives as medicaments Download PDF

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GB2151612A
GB2151612A GB08429340A GB8429340A GB2151612A GB 2151612 A GB2151612 A GB 2151612A GB 08429340 A GB08429340 A GB 08429340A GB 8429340 A GB8429340 A GB 8429340A GB 2151612 A GB2151612 A GB 2151612A
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methoxyphenyl
addition salts
amino
ethanol
ethanols
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GB2151612B (en
GB8429340D0 (en
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Louis Lafon
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Cephalon France SAS
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Laboratoire L Lafon SA
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Priority claimed from FR8318869A external-priority patent/FR2555574B2/en
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/13Amines
    • A61K31/135Amines having aromatic rings, e.g. ketamine, nortriptyline
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/33Heterocyclic compounds
    • A61K31/335Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
    • A61K31/357Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having two or more oxygen atoms in the same ring, e.g. crown ethers, guanadrel
    • A61K31/36Compounds containing methylenedioxyphenyl groups, e.g. sesamin

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

Abstract

2-Amino-1 -(methoxyphenyl)-1 -ethanol derivatives of the formula <IMAGE> (wherein Z is C4-C8-alkyl or hydroxyalkyl group having a branched hydrocarbon chain) and their addition salts, are useful as vasodilating agents. Some exhibit antidepressant and sedative effects also.

Description

SPECIFICATION Medicaments belonging to the family of 2-amino-i -(methoxyphenyl)-1 -ethanol derivatives This invention relates to the use of new medicaments, which belong to the 2-amino-1-phenyl-1ethanols family, namely 2-amino-1-(methoxyphenyl)-1-ethanol derivatives which are useful in therapeutics as agents acting on the central nervous system (CNS) and on the cardiovascular system.
It is known from FR-A-2 460 668 that 2-amino-l-phenyl-l -ethanol derivatives of the general formula
Wherein R is H, CH3, OCH3; R1 is in particular C1-C4-alkyl; and R2 is C5-C8-alkyl and may represent in certain conditions CH(CH3)2 or C(CH3)3] have been recommended as substances useful in therapeutics. However FR-A-2 460 668 neither discloses nor suggests the interest, from a therapeutical point of view, of the methoxy compounds (R = OCH3).
It is known that the 1-(2-,3- and 4-methoxyphenyl)-2-tertiobutylamino-1-ethanols have been disclosed in GB-A-1 043 519 as intermediate compounds in the synthesis of anti-diuretic substances, namely the N-methyl-N-tertiobutyl- 1-(2-, 3- and 4-methoxyphenyl)-1 -ethanols.
Moreover dimethoxyphenyl compounds, which are structurally different from the monomethoxyphenyl derivatives according to the invention, were already disclosed in the past.
In particular FR-A-1 372 742 recommends the 1-(3,4-dimethoxyphenyl)-2-tertiobutylamino-1ethanol as an agent which inhibits fi-adrenergic receptors, and FR-M-2864 recommends 1-(2,5 dimethoxyphenyl)-2-alkylamino-1-propanols as cardiac antiarythmia agents.
It has been found now that some 2-amino-1-(methoxyphenyl)-1-ethanol derivatives which can be included within the definition of the above formula lo, but without being specifically disclosed as medicaments, exhibit beneficial therapeutical properties which are particularly interesting with respect to certain diseases of the CNS and mainly to diseases of the cardiovascular system.
According to the invention are recommended as drugs, 2-amino-1-(methoxyphenyl)-1-ethanol derivatives of the formula
wherein Z is a C4-C8-alkyl group with a branched hydrocarbon chain, or a C4-C8-hydroxyalkyl group with a branched hydrocarbon chain, said drugs which are new, being characterized in that they are selected from the group consisting of:: a) the 1 -(2-methoxyphenyl), 1 -(3-methoxyphenyl)- and 1 (4-methoxyphenyl)-2-tertiobutylam- ino-1-ethanols and their addition salts, b) the 1 -(2-methoxyphenyl), 1 -(3-methoxyphenyl)- and 1 (4-methoxyphenyl)-2-[( 1 , 3-dimethyl- butyl)-amino]-1-ethanols and their addition salts, c) the 1 -(2-methoxyphenyl), 1 -(3-methoxyphenyl)- and 1 -(4-methoxyphenyl)-2-[ur, a-d i methyl-P- hydroxyethyl)-amino]-1-ethanols and their addition salts, d) the 1 -(2-methoxyphenyl), 1 -(3-methoxyphenyl)- and 1 -(4-methoxyphenyl-2-isoamylamino- 1 - ethanols and their addition salts, e) the 1-(2-methoxyphenyl, 1 -(3-methoxyphenyl)- and 1 (4-methoxyphenyl)-2-[( 1 , 1 3, 3-tetram- ethylbutyl)-amino]-1-ethanols and their addition salts, and f) the 1 -(2-methoxyphenyl), 1 -(3-methoxyphenyl)- and 1 -(4-methoxyphenyl)-2-[( 1 -isopropyl-2 methylpropyl)-amino]-1-ethanols and their addition salts.
The expression "addition salts" is understood here as meaning firstly the acid addition salts obtained by reacting one of the above-mentioned free bases with an inorganic or organic acid, and secondly the ammonium salts. Hydrochloric, hydrobromic, acetic, formic, proprionic, oxalic, fumaric, maleic, succinic, benzoic, cinnamic, mandelic, citric, malic. tartaric, aspartic, glutamic.
methanesulfonic and p-toluenesulfonic acids may be mentioned in particular among the acids which can be used to salify the abovementioned free bases. CH3l and CH3CI may be mentioned in particular among the compounds making it possible to obtain ammonium salts. In general terms. the acid addition salts are preferred to the ammonium salts.
A number of compounds useful as drugs according to the invention have been collated in Table I below without in any way implying a limitation. The most interesting compounds, from a therapeutical point of view, are the CRL 40 832 (example 5), CRL 40 774 (exampie 1), CRL 40 819 (example 4), the preferred one being the said CRL 40 832.
TABLE I
Product Code No A Z Melting Point Ex 1 (a) CRL 40 774 4-OCH3 C(CH3)3 215 C Ex 2 (a) CRL 40 798 4-OCH3 C(CH3)2CH2 OR 18200 Ex 3 (a) CRL 40 800 4-OCH3 CH(CH3)CH2CH(CH3)2 177 C Ex 4 (a) CRL 40 819 2-OCH3 C(CH3)3 174 C Ex 5 (b) CRL 40 832 3-OCH3 C(CH3)3 151 C Ex 6 (a) CRL 40 832 A 3-OCH3 C(CH3)3 184 C Ex 7 (a) - 3-OCH3 C(CH3)2CH2C(CH3)3 Ex 8 (a) - 3-OCH3 CH[CH(CH3)2]2 - Ex 9 (a) - 2-OCH3 C(CH3)2CH2OH Ex 10 (a) - 4-OCH3 CH2CH2CH(CH3)2 - Notes (a) : hydrochloride (h) : methanesulfonate The compounds according to the invention can be prepared according to a method known per se by application of classical reaction mechanisms.The method which is recommended here comprises subjecting a N-(methoxyphenyl)-amine derivative to a reduction reaction with NaBH4 or KBH4, according to the following reaction:
This reaction is carried out in an inert solvent selected from C1-C2-alcohols, at a temperature comprised between - 5'C and 0 C (for at least 0.30 h), in a proportion of 1 to 1.3 mol of borohydride selected from NaBH4 and KBH4 for 1 mol of N-(methoxyphenacyl)-amine of the formula II.
Compounds of the formula II, used here as starting material, can be prepared according the method given in French patent application No 83 1 8868 of the Applicant.
All the compounds according to the invention act as vasodilating agents, some of them exhibit interesting effect on the CNS. In particular (i) CRL 40-832 (example 5) has at a lower dose antidepressant effects (antagonism of the hypothermiae induced by the apomorphine, reserpine and oxotremorine), exhibits at a higher dose sedative effects, and decreases the intergroup aggressiveness of male mice from the dose of 1 mg/kg l.P., and, (ii) CRL40819 (example 4) decreases the intergroup aggressiveness of male mice at the dose of 8 mg/kg l.P.
According to the invention a therapeutical composition is provided which comprises, in association with a physiologically acceptable excipient, at least a 2-amino-1-(methoxyphneyl)-1ethanol or one of its addition salts, as the active ingredient.
Of course, in a composition of this type the active ingredient which is selected from the group consisting of 2-amino-1-(methoxyphenyl)-1-ethanol derivatives and non-toxic addition salts thereof is present in a pharmaceutially effective amount.
Further advantages and characteristics of the invention will be understood more clearly on reading the following description of preparative examples and results of pharmacological assays; these data as a whole do not imply a limitation but are given by way of illustration.
PREPARATION I Obtention of I -(4-methoxyphenyl)-%f( 1, 3-dimethylbutyl)aminol- 1-ethanol (Example 3; Code No: CRL 40 800) 26.1 g (0.0914 Mol) of N-(4-methoxyphenacyl)-1,3-dimethylbutylamine hydrochloride (Code No: CRL 40 799; MP = 1 90"C with decomposition) are dissolved in water. NaCO3 is added up to a pH of 11. The mixture thus obtained is extracted with 500 ml of diethylether, the ethereal phase is washed with H20, dried over MgSO4 and filtered in order to recover the filtrate which contain the N-(4-methoxyphenacyl)-1 ,3-dimethylbutylamine.
The filtrate is evaporated to dryness and the evaporation residue is taken up with 280 ml of CH3OH then cooled at - 5"C before addition of 3.5g (0.0914 mol) of NaBH4. The reaction mixture is left to evolve until disappearing of the phenacyl derivative as checked on TLC (eluent: CH3C6H-CH3COCH3-NH40H(30 :70:2) v/v; support: silica gel plate; revelation: U.V. radiation + Draggendorf reagent]. After addition of acetic acid, the reaction mixture is evaporated to dryness; the evaporation residue is taken up with 500 ml of water, adjusted to pH 11 and extracted with diethylether.
The ethereal phase is washed with water, dried over MgSO4 and filtered in order to recover the filtrate. From the filtrate the expected hydrochloride salt is precipitated by means of a 15 ml solution of HCI 7N in ethanol. Recrystallization from an acetone-ethanol (1:1) v/v mixture gives 7 g (yield: 26%) of CRL 40 800. M.P. = 177'C.
% N measured = 4.86 % Analysis % N theoretical = 4.86 % PREPARATION II Obtention of 1 -(4-meThoxyphenyl)-2-U', tr-dimethyl- - h ydroxyethyl)-amino]- 1- ethanol hydrochloride, alternative nomenclature: 1-(4-methoxyphenyl)-2-[2-(2-hydroxymethyl- propyl)-amino]-1-ethanol.
(Example 2; Code No: CRL 40 798) 50 g (0.218 mol) of 4-methoxyphenacyl bromide (in solution in 200 ml of chloroform) are poured into a solution of 77.6 g (0.872 mol) of 2-(2-hydroxymethyl-propyl)-amine in 100 ml of methanol. The reaction mixture is heated under reflux for 2 h, cdoled, evaporated to dryness, and the evaporation residue is taken up with 500 ml of water and extracted with ethyl acetate.
The ethyl acetate phase is washed with water and extracted by a mixture consisting of 500 ml of water and 22 ml of concentrated hydrochloric acid (d = 1.19). The aqueous phase is washed with CH3CO2C2H5 alcalinized up to pH 11 with K,CO,. extracted with CH3CO2C2H5. The organic phase is washed with water, dried over MgSO4 and filtered. The filtrate which comprises the N (4-methoxyphenacyl)-N-2-(2-hydroxymethyl-propyl)amine of the formula
is evaporated to dryness.
The evaporation residue is dissolved in 680 ml of methanol, cooled at - 5'C and 9.1 g (0.24 mol) of NaBH, are added. The reaction is left to evolve until total disappearing of the phenacyl compound as checked on TLC (as indicated above in Preparation I), then 14.5 ml of acetic acid are added and the resulting mixture is evaporated to dryness. The evaporation residue is taken up with 300 ml of water. After extraction with CH3CO2C2H5, washing the ester phase with water, drying over MgSO4 and filtration for removing MgSO4, the expected hydrochloride salt is obtained by means of a 31 ml solution of HO 7N in ethanol.Recrystallization from an acetonemethanol (1:1) v/v mixture gives 5 g (overall yieid: 8%) of CRL 40 798 M.P. = 182"C.
% N measured = 5.00 % Analysis % N theoretical = 5.08 % PREPARATION III Obtention of 1 (3-methoxyphenyl)-2-tertiobutylamino- methanol methanesulfonate.
(Example 5; Code No = CRL40 832) NaBH4 (0.12 mol) is introduced at - 5"C into a solution of 0.10 mol of N-(3-methoxyphenacyl)-tertiobutylamine in methanol. The reaction is left to evolve until total disappearing of the phenacyl compound as checked on TLC (as indicated above in Preparation I), then acetic is added and the resulting mixture is evaporated to dryness. The evaporation residue is taken up with H20; after extraction with either, washing the ethereal phase with water, drying over MgSO4 and filtration in order to discard MgS04, the expected methanesulfonate salt is obtained by addition of methanesulfonic acid. Recrystallization from an acetone-methanol (1 )v/v mixture CRL40832 with a yieid of 35% M.P. = 151 C.
Results of assays, which have been carried out, are summed up hereinafter.
A-CRL 40 774 (Example 1) On nembutal anesthetized dog, it is observed that CRL 40 774 administered by l.V. route exhibits a femoral vasodilating action at a dose of 10 mg/kg (+ 36%). As from 1 mg/kg CRL 40 74 presents an important bradycardial effect, and as from 5 mg/kg an hypotensive action. It seems that CRL 40 774 possesses a fli action, since, besides its own effect, it highly decreases the isoprenaline ss-stimulating action; moreover its femoral vasodilating action seems to be of the ss2+ type.
On awake normotensive dogs CRL40774 has a slight hypotensive effect (- 18%) at a dose of 10 mg/kg per os.
On awake and spontaneously hypertensive rats, the minimal hypotensive dose of CRL 40 774 per os is 5 mg/kg.
B--CRL 40 798 (Example 2) CRL 40 798 exhibits on the nembutal anesthetized dog a femoral vasodilating effect. It seems to present a ssl- effect.
C-CRL 40 800 (Example 3) CRL 40 800 exhibits a femoral vasodilating action as from the dose of 1 mg/kg. It seems to present a ss+ effect.
D-CRL 40 819 (Example 4) CRL 40 819 administered intraduodenally to nembutal anesthetized dogs. It exhibits an important hypotensive action as from the dose of 20 mg/kg. This product seems to have a fl effect. Moreover it decreases aggressiveness as from 8 mg/kg l.P. on male mice according to the intergroup aggressiveness test.
E-CRL 40 832 (Example 5) CRL 40 832 exhibits, on one hand, at lower doses, effects of the antidepressive type (antagonism of hypothermia induced by apomorphine, reserpine or oxotremorine), and, on the other hand, at higher doses, effects the sedative type which can explain only partially the clear decrease of aggressiveness.
Moreover, CRL 40 832 administered intraduodenally to anesthetized dogs at doses from 0.1 to 20 mg/kg exhibits a femoral vasodilating activity as from 0.1 mg/kg. the effect is proportionnal to the dose used and has a duration higher than 1 hour. It is also observed that, at lower doses, the compound induces tachycardia and vertebral vasodilatation which are both moderate. It seems that CRL 40 832 has a ssl~ effect. This product is useful in particular as periphereal vasodilating agent.

Claims (9)

1. A medicament belonging to the group of the 2-amino-1-(methoxyphenyl)-1-ethanols of the formula
wherein Z is a C4-C8-alkyl group with a branched hydrocarbon chain, said medicament being characterized in that it is selected from the group consisting of: a) the 1 -(2-methoxyphenyl), 1-(3-methoxyphenyl)- and 1 -(4-methoxyphenyl)-2-tertiobutylamino-1-ethanols and their addition salts, b) the 1 -(2-methoxyphenyl), 1 (3-methoxyphenyl)- and 1 -(4-methoxyphenyl)-2-[( 1,3-dimethyl- butyl)-amino]-1-ethanols and their addition salts, c) the 1 -(2-methoxyphenyl), 1 -(3-methoxyphenyl)- and 1-(4-methoxyphenyl)-2-[&alpha;,&alpha;;-dimethyl-ss- hydroxyethyl)-amino]-1-ethanols and their addition salts, d) the 1 -(2-methoxyphenyl), 1 -(3-methoxyphenyl)- and 1 -(4-methoxyphenyl)-2-isoamylamino-1 - ethanols and their addition salts, e) the 1 -(2-methoxyphenyl), 1-(3-methoxyphenyl)-and 1 -(4-methoxyphenyl)-2-[1 , 1,3,3-tetram- ethylbutyl)-amino]-1-ethanois and their addition salts, and f) the 1 -(2-methoxyphenyl), 1 -(3-methoxyphenyl)- and 1 -(4-methoxyphenyl)-2-( 1 -isopropyl-2- methylpropyl)-amino]-1-ethanols and their addition salts.
2. A medicament according to claim 1, characterized in that it is selected from the group consisting of the 1-(4-methoxyphenyl)-2-tertiobutylamino-1-ethanol and its addition salts.
3. A medicament acording to claim 1, characterized in that it is selected rom the group consisting of the 1-(4-methoxyphenyl)-2-[(&alpha;,&alpha;-dimethyl-ss-hydroxyethyl)-amino]-1-ethanol and its addition salts.
4. A medicament according to claim 1, characterized in that it is selected from the group consisting of the 1-(4-methoxyphenyl)-2-[(1,3-dimethylbutyl)-amino]-1-ethanol and its addition salts.
5. A medicament according to claim 1, characterized in that it is selected from the group consisting of the 1-(2-methoxyphenyl)-2-tertiobutylamino-1-ethanol and its addition salts.
6. A medicament according to claim 1, characterized in that it is selected from the group consisting of the 1-(3-methoxyphenyl)-2-tertiobutylamino-1-ethanol and its addition salts.
7. A medicament according to claim 1 which is 1-(3-methoxyphenyl)-2-tertiobutylamino-1ethanol methanesulfonate.
8. A therapeutical composition characterized in that it comprises, in association with a physiologically acceptable excipient, at least a 2-amino-1-(methoxyphenyl)-1-ethanol derivative or one of its addition salts according to any one of claim 1 to 7.
9. A medicament substantially as hereinbefore described in any one of the preparative Examples.
GB08429340A 1983-11-25 1984-11-21 The use of the family of 2-amino-1-(methoxyphenyl)-1- ethanol derivatives for the manufacture of a medicament for use as a vasodilating agent Expired GB2151612B (en)

Applications Claiming Priority (1)

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FR8318869A FR2555574B2 (en) 1979-07-13 1983-11-25 2-AMINO-1- (METHOXYPHENYL) -1-ETHANOL DERIVATIVES USEFUL AS MEDICAMENTS

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GB8429340D0 GB8429340D0 (en) 1985-01-03
GB2151612A true GB2151612A (en) 1985-07-24
GB2151612B GB2151612B (en) 1988-08-03

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CH (1) CH660728A5 (en)
GB (1) GB2151612B (en)
IT (1) IT1179828B (en)
ZA (1) ZA849158B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017014524A (en) * 2011-07-28 2017-01-19 アンガス ケミカル カンパニー Amino alcohol compound and use thereof as zero or low voc additive for paint and coating
US11357757B2 (en) 2017-09-13 2022-06-14 Atrogi Ab Heteroaryl substituted beta-hydroxyethylamines for use in treating hyperglycaemia
US11427539B2 (en) 2017-09-13 2022-08-30 Atrogi Ab Beta-hydroxy heterocyclic amines and their use in the treatment of hyperglycaemia
US11648216B2 (en) 2017-09-13 2023-05-16 Atrogi Ab Fluorophenyl beta-hydroxyethylamines and their use in the treatment of hyperglycaemia
US11793774B2 (en) 2017-09-13 2023-10-24 Atrogi Ab Chiral beta-hydroxyethylamines and their use in the treatment of hyperglycemia

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2460668A1 (en) * 1979-07-13 1981-01-30 Lafon Labor 2-Amino-1-phenyl-1-ethanol cpds. - use as medicaments, i.e. as CNS and/or cardiovascular agents

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2460668A1 (en) * 1979-07-13 1981-01-30 Lafon Labor 2-Amino-1-phenyl-1-ethanol cpds. - use as medicaments, i.e. as CNS and/or cardiovascular agents

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017014524A (en) * 2011-07-28 2017-01-19 アンガス ケミカル カンパニー Amino alcohol compound and use thereof as zero or low voc additive for paint and coating
US11357757B2 (en) 2017-09-13 2022-06-14 Atrogi Ab Heteroaryl substituted beta-hydroxyethylamines for use in treating hyperglycaemia
US11427539B2 (en) 2017-09-13 2022-08-30 Atrogi Ab Beta-hydroxy heterocyclic amines and their use in the treatment of hyperglycaemia
US11648216B2 (en) 2017-09-13 2023-05-16 Atrogi Ab Fluorophenyl beta-hydroxyethylamines and their use in the treatment of hyperglycaemia
US11793774B2 (en) 2017-09-13 2023-10-24 Atrogi Ab Chiral beta-hydroxyethylamines and their use in the treatment of hyperglycemia
US12036210B2 (en) 2017-09-13 2024-07-16 Atrogi Ab Heteroaryl substituted beta-hydroxyethylamines for use in treating hyperglycaemia

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IT8468172A1 (en) 1986-05-23
CH660728A5 (en) 1987-06-15
IT8468172A0 (en) 1984-11-23
GB2151612B (en) 1988-08-03
ZA849158B (en) 1985-07-31
BE901127A (en) 1985-03-15
GB8429340D0 (en) 1985-01-03
IT1179828B (en) 1987-09-16

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