HU184917B - Process for preparing 7-substituted pgi down 2 derivatives - Google Patents
Process for preparing 7-substituted pgi down 2 derivatives Download PDFInfo
- Publication number
- HU184917B HU184917B HU258780A HU258780A HU184917B HU 184917 B HU184917 B HU 184917B HU 258780 A HU258780 A HU 258780A HU 258780 A HU258780 A HU 258780A HU 184917 B HU184917 B HU 184917B
- Authority
- HU
- Hungary
- Prior art keywords
- pgi
- group
- oxo
- alkyl
- methyl ester
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title 1
- 150000001875 compounds Chemical class 0.000 claims abstract description 32
- -1 alkali metal cation Chemical group 0.000 claims abstract description 17
- 239000002585 base Substances 0.000 claims abstract description 13
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 11
- 150000003174 prostaglandin I2 derivatives Chemical class 0.000 claims abstract description 9
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 8
- 239000001257 hydrogen Substances 0.000 claims abstract description 8
- 125000004043 oxo group Chemical group O=* 0.000 claims abstract description 6
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 claims abstract description 4
- 125000002861 (C1-C4) alkanoyl group Chemical group 0.000 claims abstract description 3
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 3
- 125000003236 benzoyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C(*)=O 0.000 claims abstract description 3
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 3
- 239000011737 fluorine Substances 0.000 claims abstract description 3
- 125000001412 tetrahydropyranyl group Chemical group 0.000 claims abstract description 3
- 125000004665 trialkylsilyl group Chemical group 0.000 claims abstract description 3
- 125000004178 (C1-C4) alkyl group Chemical group 0.000 claims abstract 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract 4
- 238000000034 method Methods 0.000 claims description 15
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 12
- 150000004702 methyl esters Chemical class 0.000 claims description 8
- 238000006704 dehydrohalogenation reaction Methods 0.000 claims description 7
- FGOJCPKOOGIRPA-UHFFFAOYSA-N 1-o-tert-butyl 4-o-ethyl 5-oxoazepane-1,4-dicarboxylate Chemical compound CCOC(=O)C1CCN(C(=O)OC(C)(C)C)CCC1=O FGOJCPKOOGIRPA-UHFFFAOYSA-N 0.000 claims description 6
- 229910052736 halogen Inorganic materials 0.000 claims description 5
- KPADFPAILITQBG-UHFFFAOYSA-N non-4-ene Chemical compound CCCCC=CCCC KPADFPAILITQBG-UHFFFAOYSA-N 0.000 claims description 5
- RHUYHJGZWVXEHW-UHFFFAOYSA-N 1,1-Dimethyhydrazine Chemical compound CN(C)N RHUYHJGZWVXEHW-UHFFFAOYSA-N 0.000 claims description 4
- GMPKIPWJBDOURN-UHFFFAOYSA-N Methoxyamine Chemical compound CON GMPKIPWJBDOURN-UHFFFAOYSA-N 0.000 claims description 3
- 150000002431 hydrogen Chemical class 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 125000003545 alkoxy group Chemical group 0.000 claims description 2
- QDRKDTQENPPHOJ-UHFFFAOYSA-N sodium ethoxide Chemical compound [Na+].CC[O-] QDRKDTQENPPHOJ-UHFFFAOYSA-N 0.000 claims description 2
- 150000002148 esters Chemical class 0.000 claims 1
- 125000001475 halogen functional group Chemical group 0.000 claims 1
- 125000004356 hydroxy functional group Chemical group O* 0.000 claims 1
- 230000002744 anti-aggregatory effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract description 4
- 239000007864 aqueous solution Substances 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 230000007062 hydrolysis Effects 0.000 abstract description 3
- 238000006460 hydrolysis reaction Methods 0.000 abstract description 3
- 150000003839 salts Chemical class 0.000 abstract description 3
- 125000005843 halogen group Chemical group 0.000 abstract 2
- 125000000229 (C1-C4)alkoxy group Chemical group 0.000 abstract 1
- DIIIISSCIXVANO-UHFFFAOYSA-N 1,2-Dimethylhydrazine Chemical compound CNNC DIIIISSCIXVANO-UHFFFAOYSA-N 0.000 abstract 1
- 101000862089 Clarkia lewisii Glucose-6-phosphate isomerase, cytosolic 1A Proteins 0.000 abstract 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 abstract 1
- 125000004432 carbon atom Chemical group C* 0.000 abstract 1
- 239000008194 pharmaceutical composition Substances 0.000 abstract 1
- KAQKFAOMNZTLHT-OZUDYXHBSA-N prostaglandin I2 Chemical compound O1\C(=C/CCCC(O)=O)C[C@@H]2[C@@H](/C=C/[C@@H](O)CCCCC)[C@H](O)C[C@@H]21 KAQKFAOMNZTLHT-OZUDYXHBSA-N 0.000 abstract 1
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 48
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 48
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 16
- 239000000203 mixture Substances 0.000 description 15
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 12
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 9
- 238000004809 thin layer chromatography Methods 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000011541 reaction mixture Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- RTEXIPZMMDUXMR-UHFFFAOYSA-N benzene;ethyl acetate Chemical compound CCOC(C)=O.C1=CC=CC=C1 RTEXIPZMMDUXMR-UHFFFAOYSA-N 0.000 description 6
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 6
- 235000019341 magnesium sulphate Nutrition 0.000 description 6
- 239000000741 silica gel Substances 0.000 description 6
- 229910002027 silica gel Inorganic materials 0.000 description 6
- MDHYEMXUFSJLGV-UHFFFAOYSA-N beta-phenethyl acetate Natural products CC(=O)OCCC1=CC=CC=C1 MDHYEMXUFSJLGV-UHFFFAOYSA-N 0.000 description 5
- 159000000000 sodium salts Chemical class 0.000 description 5
- PCLIMKBDDGJMGD-UHFFFAOYSA-N N-bromosuccinimide Chemical compound BrN1C(=O)CCC1=O PCLIMKBDDGJMGD-UHFFFAOYSA-N 0.000 description 4
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 4
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- JPJALAQPGMAKDF-UHFFFAOYSA-N selenium dioxide Chemical compound O=[Se]=O JPJALAQPGMAKDF-UHFFFAOYSA-N 0.000 description 4
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 3
- UJTTUOLQLCQZEA-UHFFFAOYSA-N 9h-fluoren-9-ylmethyl n-(4-hydroxybutyl)carbamate Chemical compound C1=CC=C2C(COC(=O)NCCCCO)C3=CC=CC=C3C2=C1 UJTTUOLQLCQZEA-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000012043 crude product Substances 0.000 description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical group [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 101001000733 Rhodococcus jostii (strain RHA1) Glucose-6-phosphate isomerase 3 Proteins 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 238000004587 chromatography analysis Methods 0.000 description 2
- 239000003480 eluent Substances 0.000 description 2
- 125000003500 enol ether group Chemical group 0.000 description 2
- KAQKFAOMNZTLHT-VVUHWYTRSA-N epoprostenol Chemical compound O1C(=CCCCC(O)=O)C[C@@H]2[C@@H](/C=C/[C@@H](O)CCCCC)[C@H](O)C[C@@H]21 KAQKFAOMNZTLHT-VVUHWYTRSA-N 0.000 description 2
- 229960001123 epoprostenol Drugs 0.000 description 2
- 150000007529 inorganic bases Chemical class 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- 150000007530 organic bases Chemical class 0.000 description 2
- 210000004623 platelet-rich plasma Anatomy 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 2
- LEHBURLTIWGHEM-UHFFFAOYSA-N pyridinium chlorochromate Chemical compound [O-][Cr](Cl)(=O)=O.C1=CC=[NH+]C=C1 LEHBURLTIWGHEM-UHFFFAOYSA-N 0.000 description 2
- 239000012429 reaction media Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- KWPQTFXULUUCGD-UHFFFAOYSA-N 3,4,5,7,8,9,10,10a-octahydropyrido[1,2-a][1,4]diazepine Chemical compound C1CCN=CC2CCCCN21 KWPQTFXULUUCGD-UHFFFAOYSA-N 0.000 description 1
- 229910004373 HOAc Inorganic materials 0.000 description 1
- 101000610640 Homo sapiens U4/U6 small nuclear ribonucleoprotein Prp3 Proteins 0.000 description 1
- 241000283973 Oryctolagus cuniculus Species 0.000 description 1
- 101001110823 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) 60S ribosomal protein L6-A Proteins 0.000 description 1
- 101000712176 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) 60S ribosomal protein L6-B Proteins 0.000 description 1
- 102100040374 U4/U6 small nuclear ribonucleoprotein Prp3 Human genes 0.000 description 1
- 238000005903 acid hydrolysis reaction Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000003849 aromatic solvent Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- NWSBNVVOFKKFNV-UHFFFAOYSA-N chloroform;oxolane Chemical compound ClC(Cl)Cl.C1CCOC1 NWSBNVVOFKKFNV-UHFFFAOYSA-N 0.000 description 1
- 230000001120 cytoprotective effect Effects 0.000 description 1
- 238000010511 deprotection reaction Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- XNXVOSBNFZWHBV-UHFFFAOYSA-N hydron;o-methylhydroxylamine;chloride Chemical compound Cl.CON XNXVOSBNFZWHBV-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- LPNYRYFBWFDTMA-UHFFFAOYSA-N potassium tert-butoxide Chemical compound [K+].CC(C)(C)[O-] LPNYRYFBWFDTMA-UHFFFAOYSA-N 0.000 description 1
- 230000003389 potentiating effect Effects 0.000 description 1
- 230000009711 regulatory function Effects 0.000 description 1
- SPVXKVOXSXTJOY-UHFFFAOYSA-N selane Chemical class [SeH2] SPVXKVOXSXTJOY-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- YYCIBTCQCMPCMU-XKZHYVMSSA-M sodium;(5z)-5-[(3ar,4r,5r,6as)-5-hydroxy-4-[(e,3s)-3-hydroxyoct-1-enyl]-3-oxo-4,5,6,6a-tetrahydro-3ah-cyclopenta[b]furan-2-ylidene]pentanoate Chemical class [Na+].O1\C(=C/CCCC([O-])=O)C(=O)[C@@H]2[C@@H](/C=C/[C@@H](O)CCCCC)[C@H](O)C[C@@H]21 YYCIBTCQCMPCMU-XKZHYVMSSA-M 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 208000010110 spontaneous platelet aggregation Diseases 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- BCNZYOJHNLTNEZ-UHFFFAOYSA-N tert-butyldimethylsilyl chloride Chemical compound CC(C)(C)[Si](C)(C)Cl BCNZYOJHNLTNEZ-UHFFFAOYSA-N 0.000 description 1
- 125000001981 tert-butyldimethylsilyl group Chemical group [H]C([H])([H])[Si]([H])(C([H])([H])[H])[*]C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Landscapes
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Furan Compounds (AREA)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HU258780A HU184917B (en) | 1980-10-27 | 1980-10-27 | Process for preparing 7-substituted pgi down 2 derivatives |
| GB8132351A GB2088856B (en) | 1980-10-27 | 1981-10-27 | 7-substituted pg12-derivatives their preparation and pharmaceutical compositions containing them |
| US06/315,408 US4565827A (en) | 1980-10-27 | 1981-10-27 | 7-Substituted PGI2 -derivatives and pharmaceutical compositions containing them |
| JP17086381A JPS5799580A (en) | 1980-10-27 | 1981-10-27 | 7-substituted pgi2 derivative and manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HU258780A HU184917B (en) | 1980-10-27 | 1980-10-27 | Process for preparing 7-substituted pgi down 2 derivatives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| HU184917B true HU184917B (en) | 1984-11-28 |
Family
ID=10960137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| HU258780A HU184917B (en) | 1980-10-27 | 1980-10-27 | Process for preparing 7-substituted pgi down 2 derivatives |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS5799580A (enrdf_load_stackoverflow) |
| HU (1) | HU184917B (enrdf_load_stackoverflow) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5795980A (en) * | 1980-12-09 | 1982-06-15 | Teijin Ltd | 7-hydroxy pgi2 and its preparation |
| EP0054795B1 (en) * | 1980-12-09 | 1987-07-15 | Teijin Limited | Novel halogenated prostacyclins, process for the production thereof, and pharmaceutical use thereof |
| ZA821449B (en) * | 1981-03-11 | 1983-01-26 | Hoffmann La Roche | Novel fluoro prostacyclins |
| JPS57169479A (en) * | 1981-04-10 | 1982-10-19 | Teijin Ltd | 7-hydroxy-pgi2 and its preparation |
| JPS58150583A (ja) * | 1982-03-04 | 1983-09-07 | Teijin Ltd | 新規なハロゲン化プロスタサイクリン類、それらの製造法およびそれらを活性成分とする薬学的組成物 |
| JPS58183683A (ja) * | 1982-04-22 | 1983-10-26 | Teijin Ltd | ５−ハロ−７−ヒドロキシプロスタグランジンｉ↓１類およびその製造法 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5746977A (en) * | 1980-09-03 | 1982-03-17 | Teijin Ltd | Novel prostacyclin and its preparation |
-
1980
- 1980-10-27 HU HU258780A patent/HU184917B/hu not_active IP Right Cessation
-
1981
- 1981-10-27 JP JP17086381A patent/JPS5799580A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0314030B2 (enrdf_load_stackoverflow) | 1991-02-25 |
| JPS5799580A (en) | 1982-06-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| HU90 | Patent valid on 900628 | ||
| HMM4 | Cancellation of final prot. due to non-payment of fee |