CA2113349C - Method of producing a quinolonecarboxylic acid derivative - Google Patents
Method of producing a quinolonecarboxylic acid derivative Download PDFInfo
- Publication number
- CA2113349C CA2113349C CA002113349A CA2113349A CA2113349C CA 2113349 C CA2113349 C CA 2113349C CA 002113349 A CA002113349 A CA 002113349A CA 2113349 A CA2113349 A CA 2113349A CA 2113349 C CA2113349 C CA 2113349C
- Authority
- CA
- Canada
- Prior art keywords
- group
- general formula
- lower alkyl
- alkyl group
- substituted
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- XOQQVKDBGLYPGH-UHFFFAOYSA-N 2-oxo-1h-quinoline-3-carboxylic acid Chemical class C1=CC=C2NC(=O)C(C(=O)O)=CC2=C1 XOQQVKDBGLYPGH-UHFFFAOYSA-N 0.000 title description 3
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 25
- -1 6-fluoro-7-substituted quinolonecarboxylic acid Chemical class 0.000 claims abstract description 19
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 17
- 125000003282 alkyl amino group Chemical group 0.000 claims abstract description 15
- 125000003277 amino group Chemical group 0.000 claims abstract description 15
- 239000011541 reaction mixture Substances 0.000 claims abstract description 10
- 239000002253 acid Substances 0.000 claims abstract description 8
- 125000003710 aryl alkyl group Chemical group 0.000 claims abstract description 7
- 125000003545 alkoxy group Chemical group 0.000 claims abstract description 6
- 125000003118 aryl group Chemical group 0.000 claims abstract description 6
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 6
- 150000002148 esters Chemical class 0.000 claims abstract description 6
- 125000005843 halogen group Chemical group 0.000 claims abstract description 6
- 125000000623 heterocyclic group Chemical group 0.000 claims abstract description 6
- 125000003107 substituted aryl group Chemical group 0.000 claims abstract description 6
- NHROTQIETDGGMP-UHFFFAOYSA-N 6-fluoro-2-oxo-1h-quinoline-3-carboxylic acid Chemical class FC1=CC=C2NC(=O)C(C(=O)O)=CC2=C1 NHROTQIETDGGMP-UHFFFAOYSA-N 0.000 claims abstract description 3
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 18
- 239000002904 solvent Substances 0.000 claims description 6
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical group [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical group [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Chemical group BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052794 bromium Inorganic materials 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 239000000460 chlorine Chemical group 0.000 claims description 3
- 229910052731 fluorine Inorganic materials 0.000 claims description 3
- 239000011737 fluorine Substances 0.000 claims description 3
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical group II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 claims description 3
- 125000004170 methylsulfonyl group Chemical group [H]C([H])([H])S(*)(=O)=O 0.000 claims description 3
- 125000003170 phenylsulfonyl group Chemical group C1(=CC=CC=C1)S(=O)(=O)* 0.000 claims description 3
- 125000001559 cyclopropyl group Chemical group [H]C1([H])C([H])([H])C1([H])* 0.000 claims 1
- 125000001153 fluoro group Chemical group F* 0.000 claims 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 claims 1
- 238000010534 nucleophilic substitution reaction Methods 0.000 abstract description 8
- 239000000126 substance Substances 0.000 abstract description 6
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 42
- 150000001875 compounds Chemical class 0.000 description 24
- 238000006243 chemical reaction Methods 0.000 description 22
- 230000015572 biosynthetic process Effects 0.000 description 13
- 239000000243 solution Substances 0.000 description 13
- 238000003786 synthesis reaction Methods 0.000 description 12
- 239000013078 crystal Substances 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 125000001424 substituent group Chemical group 0.000 description 9
- WQJZXSSAMGZVTM-UHFFFAOYSA-N 1-cyclopropyl-6,7-difluoro-8-methoxy-4-oxoquinoline-3-carboxylic acid Chemical compound COC1=C(F)C(F)=CC(C(C(C(O)=O)=C2)=O)=C1N2C1CC1 WQJZXSSAMGZVTM-UHFFFAOYSA-N 0.000 description 8
- 238000000655 nuclear magnetic resonance spectrum Methods 0.000 description 8
- WRECIMRULFAWHA-UHFFFAOYSA-N trimethyl borate Chemical compound COB(OC)OC WRECIMRULFAWHA-UHFFFAOYSA-N 0.000 description 8
- 239000004327 boric acid Substances 0.000 description 7
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 6
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 6
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 6
- LISFMEBWQUVKPJ-UHFFFAOYSA-N quinolin-2-ol Chemical group C1=CC=C2NC(=O)C=CC2=C1 LISFMEBWQUVKPJ-UHFFFAOYSA-N 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 description 4
- NQRYJNQNLNOLGT-UHFFFAOYSA-N Piperidine Chemical compound C1CCNCC1 NQRYJNQNLNOLGT-UHFFFAOYSA-N 0.000 description 4
- 150000001412 amines Chemical class 0.000 description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 4
- 238000009776 industrial production Methods 0.000 description 4
- 229910015900 BF3 Inorganic materials 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- RWRDLPDLKQPQOW-UHFFFAOYSA-N Pyrrolidine Chemical compound C1CCNC1 RWRDLPDLKQPQOW-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Chemical compound FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 description 3
- 150000001721 carbon Chemical group 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- LJAXTAOSOVPBQH-UHFFFAOYSA-N n-methylpiperidin-3-amine Chemical compound CNC1CCCNC1 LJAXTAOSOVPBQH-UHFFFAOYSA-N 0.000 description 3
- 239000002243 precursor Substances 0.000 description 3
- UNORZDBRVXXJAI-UHFFFAOYSA-N 1-ethyl-6,7-difluoro-8-methoxy-4-oxoquinoline-3-carboxylic acid Chemical compound FC1=C(F)C(OC)=C2N(CC)C=C(C(O)=O)C(=O)C2=C1 UNORZDBRVXXJAI-UHFFFAOYSA-N 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- YNAVUWVOSKDBBP-UHFFFAOYSA-N Morpholine Chemical compound C1COCCN1 YNAVUWVOSKDBBP-UHFFFAOYSA-N 0.000 description 2
- 125000004442 acylamino group Chemical group 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 238000006798 ring closing metathesis reaction Methods 0.000 description 2
- IAAQSELMALGRKO-UHFFFAOYSA-N 1-cyclopropyl-6-fluoro-8-methoxy-7-morpholin-4-yl-4-oxoquinoline-3-carboxylic acid Chemical compound FC1=CC(C(C(C(O)=O)=CN2C3CC3)=O)=C2C(OC)=C1N1CCOCC1 IAAQSELMALGRKO-UHFFFAOYSA-N 0.000 description 1
- XZQOIMRPWZHVRM-UHFFFAOYSA-N 1-ethyl-6-fluoro-8-methoxy-4-oxo-7-piperazin-1-ylquinoline-3-carboxylic acid Chemical compound COC1=C2N(CC)C=C(C(O)=O)C(=O)C2=CC(F)=C1N1CCNCC1 XZQOIMRPWZHVRM-UHFFFAOYSA-N 0.000 description 1
- BGCCNPIFYAKMFI-UHFFFAOYSA-N 1-ethyl-6-fluoro-8-methoxy-4-oxo-7-piperidin-1-ylquinoline-3-carboxylic acid Chemical compound COC1=C2N(CC)C=C(C(O)=O)C(=O)C2=CC(F)=C1N1CCCCC1 BGCCNPIFYAKMFI-UHFFFAOYSA-N 0.000 description 1
- NXRQXCFBZGIRGN-UHFFFAOYSA-N 2,3,4-trifluorobenzoyl chloride Chemical compound FC1=CC=C(C(Cl)=O)C(F)=C1F NXRQXCFBZGIRGN-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 101100172748 Mus musculus Ethe1 gene Proteins 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000003429 antifungal agent Substances 0.000 description 1
- MGQLHRYJBWGORO-UHFFFAOYSA-N balofloxacin Chemical compound C1C(NC)CCCN1C1=C(F)C=C2C(=O)C(C(O)=O)=CN(C3CC3)C2=C1OC MGQLHRYJBWGORO-UHFFFAOYSA-N 0.000 description 1
- KCXMKQUNVWSEMD-UHFFFAOYSA-N benzyl chloride Chemical compound ClCC1=CC=CC=C1 KCXMKQUNVWSEMD-UHFFFAOYSA-N 0.000 description 1
- 229940073608 benzyl chloride Drugs 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000007810 chemical reaction solvent Substances 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000007257 deesterification reaction Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 125000004494 ethyl ester group Chemical group 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000011968 lewis acid catalyst Substances 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 150000004702 methyl esters Chemical class 0.000 description 1
- 150000002780 morpholines Chemical class 0.000 description 1
- KOEKUQRWTOSZOR-UHFFFAOYSA-N n-methyl-n-pyrrolidin-3-ylacetamide Chemical compound CC(=O)N(C)C1CCNC1 KOEKUQRWTOSZOR-UHFFFAOYSA-N 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000003261 o-tolyl group Chemical group [H]C1=C([H])C(*)=C(C([H])=C1[H])C([H])([H])[H] 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 150000004885 piperazines Chemical class 0.000 description 1
- 150000003053 piperidines Chemical class 0.000 description 1
- VBUBYMVULIMEHR-UHFFFAOYSA-N propa-1,2-diene;prop-1-yne Chemical compound CC#C.C=C=C VBUBYMVULIMEHR-UHFFFAOYSA-N 0.000 description 1
- FVSKHRXBFJPNKK-UHFFFAOYSA-N propionitrile Chemical compound CCC#N FVSKHRXBFJPNKK-UHFFFAOYSA-N 0.000 description 1
- 125000002112 pyrrolidino group Chemical group [*]N1C([H])([H])C([H])([H])C([H])([H])C1([H])[H] 0.000 description 1
- 239000011369 resultant mixture Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000010898 silica gel chromatography Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/0201—Oxygen-containing compounds
- B01J31/0211—Oxygen-containing compounds with a metal-oxygen link
- B01J31/0212—Alkoxylates
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D215/00—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems
- C07D215/02—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen atoms or carbon atoms directly attached to the ring nitrogen atom
- C07D215/16—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen atoms or carbon atoms directly attached to the ring nitrogen atom 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 to ring carbon atoms
- C07D215/48—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen
- C07D215/54—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen attached in position 3
- C07D215/56—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen attached in position 3 with oxygen atoms in position 4
-
- 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
- C07D401/04—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 directly linked by a ring-member-to-ring-member bond
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plural Heterocyclic Compounds (AREA)
- Quinoline Compounds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3/175547 | 1991-07-16 | ||
| JP17554791 | 1991-07-16 | ||
| PCT/JP1992/000901 WO1993002055A1 (en) | 1991-07-16 | 1992-07-15 | Process for producing quinolonecarboxylic acid derivative |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2113349A1 CA2113349A1 (en) | 1993-02-04 |
| CA2113349C true CA2113349C (en) | 2003-08-05 |
Family
ID=15997989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002113349A Expired - Fee Related CA2113349C (en) | 1991-07-16 | 1992-07-15 | Method of producing a quinolonecarboxylic acid derivative |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0641782A1 (en16) |
| JP (1) | JP3165742B2 (en16) |
| KR (1) | KR0140158B1 (en16) |
| AU (1) | AU657352B2 (en16) |
| CA (1) | CA2113349C (en16) |
| TW (1) | TW202443B (en16) |
| WO (1) | WO1993002055A1 (en16) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6069157A (en) * | 1997-11-25 | 2000-05-30 | Pfizer Inc. | Parasiticidal compounds |
| TWI362386B (en) * | 2007-03-30 | 2012-04-21 | Daiichi Sankyo Co Ltd | A production method for the qunolon-carboxylic acid derivative |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59122470A (ja) * | 1982-12-27 | 1984-07-14 | Dai Ichi Seiyaku Co Ltd | キノリン−３−カルボン酸誘導体の製造法 |
| JPH089597B2 (ja) * | 1986-01-21 | 1996-01-31 | 杏林製薬株式会社 | 選択毒性に優れた８‐アルコキシキノロンカルボン酸およびその塩並びにその製造方法 |
| US4735949A (en) * | 1986-02-18 | 1988-04-05 | Warner-Lambert Company | Disubstituted-7-pyrrolidinonaphthyridine antibacterial agents |
| JP2693988B2 (ja) * | 1987-06-24 | 1997-12-24 | キノイン ギオギスゼル エス ベギエスゼチ テルメケク ギヤラ アールティー． | キノリンカルボン酸誘導体の製造方法 |
| AU618823B2 (en) * | 1988-07-20 | 1992-01-09 | Sankyo Company Limited | 4-oxoquinoline-3-carboxylic acid derivatives, their preparation and their use |
| EP0593766B1 (en) * | 1991-05-28 | 2000-09-06 | Daiichi Pharmaceutical Co., Ltd. | Pyridonecarboxylic acid derivative |
-
1992
- 1992-07-13 JP JP18540492A patent/JP3165742B2/ja not_active Expired - Fee Related
- 1992-07-15 KR KR1019940700120A patent/KR0140158B1/ko not_active Expired - Fee Related
- 1992-07-15 AU AU23303/92A patent/AU657352B2/en not_active Ceased
- 1992-07-15 EP EP92915777A patent/EP0641782A1/en not_active Withdrawn
- 1992-07-15 WO PCT/JP1992/000901 patent/WO1993002055A1/ja not_active Application Discontinuation
- 1992-07-15 CA CA002113349A patent/CA2113349C/en not_active Expired - Fee Related
- 1992-07-16 TW TW081105637A patent/TW202443B/zh active
Also Published As
| Publication number | Publication date |
|---|---|
| TW202443B (en16) | 1993-03-21 |
| WO1993002055A1 (en) | 1993-02-04 |
| JP3165742B2 (ja) | 2001-05-14 |
| EP0641782A4 (en) | 1994-10-17 |
| KR0140158B1 (ko) | 1998-06-01 |
| JPH05294938A (ja) | 1993-11-09 |
| AU2330392A (en) | 1993-02-23 |
| EP0641782A1 (en) | 1995-03-08 |
| AU657352B2 (en) | 1995-03-09 |
| CA2113349A1 (en) | 1993-02-04 |
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