DK175438B1 - 9-alfa-hydroxy-steroider, fremgangsmåde til deres fremstilling og fremgangsmåde til fremstillingen af de tilsvarende 9(11)-dehydro-derivater - Google Patents

9-alfa-hydroxy-steroider, fremgangsmåde til deres fremstilling og fremgangsmåde til fremstillingen af de tilsvarende 9(11)-dehydro-derivater Download PDF

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Publication number
DK175438B1
DK175438B1 DK198803131A DK313188A DK175438B1 DK 175438 B1 DK175438 B1 DK 175438B1 DK 198803131 A DK198803131 A DK 198803131A DK 313188 A DK313188 A DK 313188A DK 175438 B1 DK175438 B1 DK 175438B1
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hydroxy
methyl
hydrogen
group
water
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DK198803131A
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Danish (da)
English (en)
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DK313188D0 (da
DK313188A (da
Inventor
Jagdish Chander Kapur
Arthur Friedrich Marx
Jacobus Nicolaas Maria Batist
Willem Johan Van Zoest
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Aventis Pharma Sa
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J1/00—Normal steroids containing carbon, hydrogen, halogen or oxygen, not substituted in position 17 beta by a carbon atom, e.g. estrane, androstane
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D235/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings
    • C07D235/02—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings condensed with carbocyclic rings or ring systems
    • C07D235/04—Benzimidazoles; Hydrogenated benzimidazoles
    • C07D235/24—Benzimidazoles; Hydrogenated benzimidazoles with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached in position 2
    • C07D235/28—Sulfur atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
    • C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
    • C07D401/12—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a chain containing hetero atoms as chain links
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D413/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms
    • C07D413/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings
    • C07D413/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings linked by a chain containing hetero atoms as chain links
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
    • C07D417/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings
    • C07D417/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings linked by a chain containing hetero atoms as chain links
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J1/00—Normal steroids containing carbon, hydrogen, halogen or oxygen, not substituted in position 17 beta by a carbon atom, e.g. estrane, androstane
    • C07J1/0003—Androstane derivatives
    • C07J1/0011—Androstane derivatives substituted in position 17 by a keto group
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J1/00—Normal steroids containing carbon, hydrogen, halogen or oxygen, not substituted in position 17 beta by a carbon atom, e.g. estrane, androstane
    • C07J1/0003—Androstane derivatives
    • C07J1/0014—Androstane derivatives substituted in position 17 alfa, not substituted in position 17 beta
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J1/00—Normal steroids containing carbon, hydrogen, halogen or oxygen, not substituted in position 17 beta by a carbon atom, e.g. estrane, androstane
    • C07J1/0003—Androstane derivatives
    • C07J1/0033—Androstane derivatives substituted in position 17 alfa and 17 beta
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J1/00—Normal steroids containing carbon, hydrogen, halogen or oxygen, not substituted in position 17 beta by a carbon atom, e.g. estrane, androstane
    • C07J1/0003—Androstane derivatives
    • C07J1/0033—Androstane derivatives substituted in position 17 alfa and 17 beta
    • C07J1/004—Androstane derivatives substituted in position 17 alfa and 17 beta the substituent in position 17 alfa being an unsaturated hydrocarbon group
    • C07J1/0048—Alkynyl derivatives
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J13/00—Normal steroids containing carbon, hydrogen, halogen or oxygen having a carbon-to-carbon double bond from or to position 17
    • C07J13/005—Normal steroids containing carbon, hydrogen, halogen or oxygen having a carbon-to-carbon double bond from or to position 17 with double bond in position 16 (17)
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J21/00—Normal steroids containing carbon, hydrogen, halogen or oxygen having an oxygen-containing hetero ring spiro-condensed with the cyclopenta(a)hydrophenanthrene skeleton
    • C07J21/005—Ketals
    • C07J21/006—Ketals at position 3
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J31/00—Normal steroids containing one or more sulfur atoms not belonging to a hetero ring
    • C07J31/006—Normal steroids containing one or more sulfur atoms not belonging to a hetero ring not covered by C07J31/003
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J41/00—Normal steroids containing one or more nitrogen atoms not belonging to a hetero ring
    • C07J41/0033—Normal steroids containing one or more nitrogen atoms not belonging to a hetero ring not covered by C07J41/0005
    • C07J41/0038—Normal steroids containing one or more nitrogen atoms not belonging to a hetero ring not covered by C07J41/0005 with an androstane skeleton, including 18- or 19-substituted derivatives, 18-nor derivatives and also derivatives where position 17-beta is substituted by a carbon atom not directly bonded to a further carbon atom and not being part of an amide group
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J41/00—Normal steroids containing one or more nitrogen atoms not belonging to a hetero ring
    • C07J41/0033—Normal steroids containing one or more nitrogen atoms not belonging to a hetero ring not covered by C07J41/0005
    • C07J41/0094—Normal steroids containing one or more nitrogen atoms not belonging to a hetero ring not covered by C07J41/0005 containing nitrile radicals, including thiocyanide radicals
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J43/00—Normal steroids having a nitrogen-containing hetero ring spiro-condensed or not condensed with the cyclopenta(a)hydrophenanthrene skeleton
    • C07J43/003—Normal steroids having a nitrogen-containing hetero ring spiro-condensed or not condensed with the cyclopenta(a)hydrophenanthrene skeleton not condensed
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J5/00—Normal steroids containing carbon, hydrogen, halogen or oxygen, substituted in position 17 beta by a chain of two carbon atoms, e.g. pregnane and substituted in position 21 by only one singly bound oxygen atom, i.e. only one oxygen bound to position 21 by a single bond
    • C07J5/0046—Normal steroids containing carbon, hydrogen, halogen or oxygen, substituted in position 17 beta by a chain of two carbon atoms, e.g. pregnane and substituted in position 21 by only one singly bound oxygen atom, i.e. only one oxygen bound to position 21 by a single bond substituted in position 17 alfa
    • C07J5/0053—Normal steroids containing carbon, hydrogen, halogen or oxygen, substituted in position 17 beta by a chain of two carbon atoms, e.g. pregnane and substituted in position 21 by only one singly bound oxygen atom, i.e. only one oxygen bound to position 21 by a single bond substituted in position 17 alfa not substituted in position 16
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J7/00—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms
    • C07J7/0005—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms not substituted in position 21
    • C07J7/001—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms not substituted in position 21 substituted in position 20 by a keto group
    • C07J7/004—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms not substituted in position 21 substituted in position 20 by a keto group substituted in position 17 alfa
    • C07J7/0045—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms not substituted in position 21 substituted in position 20 by a keto group substituted in position 17 alfa not substituted in position 16
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J7/00—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms
    • C07J7/0005—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms not substituted in position 21
    • C07J7/001—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms not substituted in position 21 substituted in position 20 by a keto group
    • C07J7/004—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms not substituted in position 21 substituted in position 20 by a keto group substituted in position 17 alfa
    • C07J7/005—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms not substituted in position 21 substituted in position 20 by a keto group substituted in position 17 alfa substituted in position 16
    • C07J7/0055—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms not substituted in position 21 substituted in position 20 by a keto group substituted in position 17 alfa substituted in position 16 by a saturated or unsaturated hydrocarbon group
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07J—STEROIDS
    • C07J7/00—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms
    • C07J7/008—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms substituted in position 21
    • C07J7/0085—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms substituted in position 21 by an halogen atom
DK198803131A 1986-10-10 1988-06-09 9-alfa-hydroxy-steroider, fremgangsmåde til deres fremstilling og fremgangsmåde til fremstillingen af de tilsvarende 9(11)-dehydro-derivater DK175438B1 (da)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
EP86201754 1986-10-10
EP86201754 1986-10-10
EP87201340 1987-07-13
EP87201340 1987-07-13
PCT/NL1987/000026 WO1988002753A2 (en) 1986-10-10 1987-10-09 9-alpha-hydroxy steroids and process for their preparation
NL8700026 1987-10-09

Publications (3)

Publication Number Publication Date
DK313188D0 DK313188D0 (da) 1988-06-09
DK313188A DK313188A (da) 1988-06-09
DK175438B1 true DK175438B1 (da) 2004-10-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DK198803131A DK175438B1 (da) 1986-10-10 1988-06-09 9-alfa-hydroxy-steroider, fremgangsmåde til deres fremstilling og fremgangsmåde til fremstillingen af de tilsvarende 9(11)-dehydro-derivater

Country Status (19)

Country Link
US (2) US5352809A (no)
EP (1) EP0263569B1 (no)
JP (1) JPH0826062B2 (no)
KR (1) KR960010793B1 (no)
CN (2) CN1035182C (no)
AU (1) AU607948B2 (no)
CA (1) CA1334844C (no)
DE (1) DE3783007T2 (no)
DK (1) DK175438B1 (no)
ES (1) ES2052550T3 (no)
FI (1) FI95710C (no)
GR (1) GR3006576T3 (no)
HU (2) HU204063B (no)
IE (1) IE61985B1 (no)
IL (1) IL84135A (no)
NO (1) NO174748C (no)
NZ (1) NZ222103A (no)
PT (1) PT85891B (no)
WO (1) WO1988002753A2 (no)

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JPH0826062B2 (ja) * 1986-10-10 1996-03-13 ルーセル ウクラーフ ９―α―ヒドロキシステロイド及びその製法
US4921638A (en) * 1986-11-05 1990-05-01 The Upjohn Company 17β-cyano-9α,17α-dihydroxyandrost-4-en-3-one
JP2719377B2 (ja) * 1987-12-23 1998-02-25 ルーセル ウクラーフ ９α―ヒドロキシ―１７―ケトステロイドの微生物学的製法
US5298398A (en) * 1987-12-23 1994-03-29 Gist-Brocades Nv Preparation of 9-α-hydroxy-17-keto steroids using Mycobacterium species CBS 482.86
US5364847A (en) * 1989-03-10 1994-11-15 Endorecherche Inhibitors of sex steroid biosynthesis and methods for their production and use
US5372996A (en) * 1989-03-10 1994-12-13 Endorecherche, Inc. Method of treatment of androgen-related diseases
AU5856090A (en) * 1989-07-07 1991-02-06 Endorecherche Inc. Androgen derivatives for use in the inhibition of sex steroid activity
DE69034035T2 (de) * 1989-07-07 2004-01-22 Endorecherche Inc., Ste-Foy Methode zur behandlung androgenbedingter krankheiten
MY105302A (en) * 1989-11-27 1994-09-30 Schering Corp Process for dehydrating corticosteroid intermediates.
AU7556291A (en) * 1990-03-27 1991-10-21 Schering Corporation Process for 9alpha-hydroxy steroid dehydration
US5252319A (en) * 1990-06-12 1993-10-12 Insite Vision Incorporated Aminosteroids for ophthalmic use
US5209926A (en) * 1990-06-12 1993-05-11 Insite Vision Incorporated Aminosteroids for ophthalmic use
US5124154A (en) * 1990-06-12 1992-06-23 Insite Vision Incorporated Aminosteroids for ophthalmic use
US5256408A (en) * 1990-06-12 1993-10-26 Insite Vision Incorporated Aminosteroids for ophthalmic use
WO1993015103A2 (en) * 1992-01-28 1993-08-05 Schering Corporation Novel steroid intermediates and processes for their preparation
KR950701527A (ko) * 1992-05-21 1995-04-28 라브리 페르낭 테스토스테론 5α 환원효소 활성 저해제(INHIBITORS OF TESTOSTERONE 5α-REDUCTASE ACTIVITY)
FR2692580B1 (fr) * 1992-06-19 1994-08-26 Roussel Uclaf Nouveau Procédé de préparation d'un composé stéroïde DELTA9 (11).
WO1995030684A1 (en) * 1994-05-09 1995-11-16 Pharmacia & Upjohn Company SYNTHESIS OF 17β-CYANO-3-ETHOXY-17α-HYDROXY-6-METHYLANDROSTA-3,5,9(11)-TRIENE
FR2720747B1 (fr) * 1994-06-02 1996-07-12 Roussel Uclaf Nouveau procédé de préparation d'un stéroïde 16béta-méthyl et nouveaux intermédiaires.
PT973791E (pt) 1995-12-11 2007-09-26 Searle Llc Processo para a preparação de um composto epoxi
US6887991B1 (en) 1996-12-11 2005-05-03 G. D. Searle & Company Processes for preparation of 9, 11-epoxy steroids and intermediates useful therein
ATE225367T1 (de) 1996-12-11 2002-10-15 Searle & Co Verfahren zur herstellung von 3-keto-7alpha- alkoxycarbonyl- delta4,5-steroiden sowie zwischenprodukte
US6610917B2 (en) * 1998-05-15 2003-08-26 Lester F. Ludwig Activity indication, external source, and processing loop provisions for driven vibrating-element environments
CA2330611A1 (en) 1998-05-22 1999-12-02 The Board Of Trustees Of The Leland Stanford Junior University Bifunctional molecules and therapies based thereon
US7235655B2 (en) * 2002-03-22 2007-06-26 Pharmacia & Upjohn Company Processes to prepare eplerenone
KR20040097201A (ko) * 2002-03-22 2004-11-17 파마시아 앤드 업존 캄파니 에플레레논의 제조 방법
SI1889198T1 (sl) 2005-04-28 2015-02-27 Proteus Digital Health, Inc. Farma-informacijski sistem
WO2007035716A2 (en) 2005-09-16 2007-03-29 Raptor Pharmaceutical Inc. Compositions comprising receptor-associated protein (rap) variants specific for cr-containing proteins and uses thereof
DE102007027635A1 (de) * 2007-06-12 2008-12-18 Bayer Schering Pharma Aktiengesellschaft 17ß-Cyano-19-androst-4-en-Derivat, dessen Verwendung und das Derivat enthaltende Arzneimittel
WO2010095940A2 (en) 2009-02-20 2010-08-26 To-Bbb Holding B.V. Glutathione-based drug delivery system
NZ596876A (en) 2009-05-06 2014-01-31 Lab Skin Care Inc Dermal delivery compositions comprising active agent-calcium phosphate particle complexes and methods of using the same
CN102516345B (zh) * 2011-11-01 2014-11-26 上海优拓医药科技有限公司 醋酸乌利司他及其关键中间体的制备方法
ES2576231T3 (es) * 2011-12-23 2016-07-06 Crystal Pharma S.A.U Proceso para alquinilar 17-cetoesteroides 16-sustituidos
CN112552364A (zh) * 2013-01-23 2021-03-26 司菲埃拉制药私人有限公司 用于线粒体生物发生和与线粒体功能障碍或耗竭相关的疾病的新颖11β-羟基类固醇化合物
CN103361394B (zh) * 2013-08-07 2016-08-17 中国科学院上海高等研究院 利用微生物转化制备9α-羟基-雄烯二酮的方法
WO2016013030A2 (en) 2014-07-23 2016-01-28 Sphaera Pharma Pvt. Ltd. Hydroxysteroid compounds, their intermediates, process of preparation, composition and uses thereof
CN105440094B (zh) * 2015-11-27 2017-08-25 江苏佳尔科药业集团有限公司 地塞米松中间体的制备方法
CN109369759A (zh) * 2018-11-22 2019-02-22 湖南原野医药有限公司 氢化可的松中间体17β-氰基甾体化合物的合成方法
CN109734762B (zh) * 2018-12-05 2020-04-17 郑良彬 一锅法合成16-β甲基甾体化合物的方法
CN111320665A (zh) * 2020-03-04 2020-06-23 台州仙琚药业有限公司 制备17β-氰基-17α-羟基-9-去氢雄烯二酮的方法

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CA565369A (en) * 1958-10-28 P. Graber Robert 9,11-dihydroxy steroids and processes for preparing the same
US2837545A (en) * 1957-04-29 1958-06-03 American Cyanamid Co 9alpha, 11beta, 16alpha, 17alpha, 21-penta-hydroxy-4-pregnene-3, 20 dione, its 16, 21 diesters and process of preparing the above compounds
US2840580A (en) * 1957-05-24 1958-06-24 Olin Mathieson 9alpha-hydroxy steroids
US4035236A (en) * 1975-10-24 1977-07-12 The Upjohn Company Process for preparing 9α-hydroxyandrostenedione
US4102907A (en) * 1977-03-07 1978-07-25 The Upjohn Company Desulfinylation process for preparing androsta-4,9(11)-diene-3,17-dione
US4397947A (en) * 1981-06-12 1983-08-09 G. D. Searle & Co. Microbial process for 9α-hydroxylation of steroids
US4383947A (en) * 1981-07-24 1983-05-17 The Upjohn Company Introduction of a fluorine atom
US4416821A (en) * 1982-02-17 1983-11-22 The Upjohn Company Process for preparing 16-methylene steroids
US4618456A (en) * 1984-03-20 1986-10-21 The Upjohn Company Ethynylation of 16-methyl-17-keto steroids
DE3585547D1 (de) * 1984-02-03 1992-04-16 Upjohn Co Steroide mit einer enamid- oder enimidgruppe sowie ihre herstellung.
US4705783A (en) * 1985-06-25 1987-11-10 Sri International 9α, 11β-substituted and 11β-substituted estranes
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Also Published As

Publication number Publication date
AU607948B2 (en) 1991-03-21
DK313188D0 (da) 1988-06-09
GR3006576T3 (no) 1993-06-30
IE872722L (en) 1992-04-16
NO882075L (no) 1988-05-11
CN87106868A (zh) 1988-04-27
HU211080B (en) 1995-10-30
EP0263569A2 (en) 1988-04-13
NZ222103A (en) 1990-08-28
CA1334844C (en) 1995-03-21
JPH01500907A (ja) 1989-03-30
CN1116208A (zh) 1996-02-07
FI882461A (fi) 1988-05-25
PT85891A (en) 1987-11-01
IE61985B1 (en) 1994-12-14
CN1035182C (zh) 1997-06-18
DK313188A (da) 1988-06-09
IL84135A (en) 1992-08-18
HU912420D0 (en) 1991-12-30
DE3783007D1 (de) 1993-01-21
HUT47130A (en) 1989-01-30
FI882461A0 (fi) 1988-05-25
HUT61568A (en) 1993-01-28
PT85891B (pt) 1990-07-31
FI95710B (fi) 1995-11-30
CN1036342C (zh) 1997-11-05
HU204063B (en) 1991-11-28
WO1988002753A3 (en) 1988-06-30
IL84135A0 (en) 1988-03-31
EP0263569B1 (en) 1992-12-09
US5565588A (en) 1996-10-15
FI95710C (fi) 1996-03-11
NO882075D0 (no) 1988-05-11
NO174748B (no) 1994-03-21
EP0263569A3 (en) 1988-07-20
AU8106887A (en) 1988-05-06
JPH0826062B2 (ja) 1996-03-13
DE3783007T2 (de) 1993-07-01
NO174748C (no) 1994-06-29
US5352809A (en) 1994-10-04
KR890700129A (ko) 1989-03-02
KR960010793B1 (ko) 1996-08-08
ES2052550T3 (es) 1994-07-16
WO1988002753A2 (en) 1988-04-21

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