CA1043340A - Preparation of 5-aroyl-pyrrole compounds - Google Patents
Preparation of 5-aroyl-pyrrole compoundsInfo
- Publication number
- CA1043340A CA1043340A CA226,261A CA226261A CA1043340A CA 1043340 A CA1043340 A CA 1043340A CA 226261 A CA226261 A CA 226261A CA 1043340 A CA1043340 A CA 1043340A
- Authority
- CA
- Canada
- Prior art keywords
- halide
- alkyl
- aroyl
- pyrrole
- toluoyl
- 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
Links
- -1 aroyl halide Chemical class 0.000 claims abstract description 56
- 238000000034 method Methods 0.000 claims abstract description 48
- 150000003233 pyrroles Chemical class 0.000 claims abstract description 14
- 125000000217 alkyl group Chemical group 0.000 claims description 48
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical group ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 24
- 238000006243 chemical reaction Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000011541 reaction mixture Substances 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 150000004820 halides Chemical class 0.000 claims description 11
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 10
- ROSYAUHHRKAPHX-UHFFFAOYSA-N 2-(1-methylpyrrol-2-yl)acetonitrile Chemical group CN1C=CC=C1CC#N ROSYAUHHRKAPHX-UHFFFAOYSA-N 0.000 claims description 9
- 239000012429 reaction media Substances 0.000 claims description 7
- YNLAOSYQHBDIKW-UHFFFAOYSA-M diethylaluminium chloride Chemical group CC[Al](Cl)CC YNLAOSYQHBDIKW-UHFFFAOYSA-M 0.000 claims description 6
- 125000005425 toluyl group Chemical group 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 125000003545 alkoxy group Chemical group 0.000 claims description 5
- 125000003118 aryl group Chemical group 0.000 claims description 5
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical group ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000000354 decomposition reaction Methods 0.000 claims description 4
- 125000005843 halogen group Chemical group 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 125000003236 benzoyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C(*)=O 0.000 claims description 3
- UAIZDWNSWGTKFZ-UHFFFAOYSA-L ethylaluminum(2+);dichloride Chemical group CC[Al](Cl)Cl UAIZDWNSWGTKFZ-UHFFFAOYSA-L 0.000 claims description 3
- 238000005917 acylation reaction Methods 0.000 claims description 2
- 229910052736 halogen Inorganic materials 0.000 claims description 2
- 150000002367 halogens Chemical class 0.000 claims description 2
- 125000002816 methylsulfanyl group Chemical group [H]C([H])([H])S[*] 0.000 claims description 2
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 claims description 2
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical group CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 claims 1
- LPYLLECCQVQPTJ-UHFFFAOYSA-N 2-[1-methyl-3-(4-methylbenzoyl)pyrrol-2-yl]acetonitrile Chemical compound C1=CC(C)=CC=C1C(=O)C1=C(CC#N)N(C)C=C1 LPYLLECCQVQPTJ-UHFFFAOYSA-N 0.000 claims 1
- 150000001350 alkyl halides Chemical class 0.000 claims 1
- 229910052801 chlorine Inorganic materials 0.000 claims 1
- 239000000460 chlorine Substances 0.000 claims 1
- 125000001309 chloro group Chemical group Cl* 0.000 claims 1
- 125000001038 naphthoyl group Chemical group C1(=CC=CC2=CC=CC=C12)C(=O)* 0.000 claims 1
- 229910052757 nitrogen Inorganic materials 0.000 claims 1
- 125000004433 nitrogen atom Chemical group N* 0.000 claims 1
- KAESVJOAVNADME-UHFFFAOYSA-N 1H-pyrrole Natural products C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 abstract description 42
- 239000000543 intermediate Substances 0.000 abstract 2
- 229940121363 anti-inflammatory agent Drugs 0.000 abstract 1
- 239000002260 anti-inflammatory agent Substances 0.000 abstract 1
- 125000003435 aroyl group Chemical group 0.000 description 18
- 239000000376 reactant Substances 0.000 description 16
- 150000001875 compounds Chemical class 0.000 description 14
- 239000000047 product Substances 0.000 description 13
- 241001163743 Perlodes Species 0.000 description 10
- DRXOPQFEWDRGKT-UHFFFAOYSA-N 1,5-dimethylpyrrole-2-carbonitrile Chemical compound CC1=CC=C(C#N)N1C DRXOPQFEWDRGKT-UHFFFAOYSA-N 0.000 description 9
- 125000005234 alkyl aluminium group Chemical group 0.000 description 9
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 description 8
- 239000002904 solvent Substances 0.000 description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 150000002430 hydrocarbons Chemical group 0.000 description 6
- 150000001408 amides Chemical class 0.000 description 5
- 229930195733 hydrocarbon Natural products 0.000 description 5
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 150000001735 carboxylic acids Chemical class 0.000 description 4
- 239000012043 crude product Substances 0.000 description 4
- 125000004093 cyano group Chemical group *C#N 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 239000012074 organic phase Substances 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 241000518994 Conta Species 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 229940037003 alum Drugs 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 150000002825 nitriles Chemical class 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 238000005727 Friedel-Crafts reaction Methods 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 125000004453 alkoxycarbonyl group Chemical group 0.000 description 2
- 239000008346 aqueous phase Substances 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- MGDOJPNDRJNJBK-UHFFFAOYSA-N ethylaluminum Chemical compound [Al].C[CH2] MGDOJPNDRJNJBK-UHFFFAOYSA-N 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 2
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 2
- 238000003822 preparative gas chromatography Methods 0.000 description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000000168 pyrrolyl group Chemical group 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- FYSNRJHAOHDILO-UHFFFAOYSA-N thionyl chloride Chemical compound ClS(Cl)=O FYSNRJHAOHDILO-UHFFFAOYSA-N 0.000 description 2
- GHPYJLCQYMAXGG-WCCKRBBISA-N (2R)-2-amino-3-(2-boronoethylsulfanyl)propanoic acid hydrochloride Chemical compound Cl.N[C@@H](CSCCB(O)O)C(O)=O GHPYJLCQYMAXGG-WCCKRBBISA-N 0.000 description 1
- MLRVZFYXUZQSRU-UHFFFAOYSA-N 1-chlorohexane Chemical compound CCCCCCCl MLRVZFYXUZQSRU-UHFFFAOYSA-N 0.000 description 1
- BQMPGKPTOHKYHS-UHFFFAOYSA-N 1h-pyrrole-2-carbonitrile Chemical compound N#CC1=CC=CN1 BQMPGKPTOHKYHS-UHFFFAOYSA-N 0.000 description 1
- GVUHUYQEAGMUNJ-UHFFFAOYSA-N 2-(1h-pyrrol-2-yl)acetic acid Chemical class OC(=O)CC1=CC=CN1 GVUHUYQEAGMUNJ-UHFFFAOYSA-N 0.000 description 1
- 125000000242 4-chlorobenzoyl group Chemical group ClC1=CC=C(C(=O)*)C=C1 0.000 description 1
- NQUVCRCCRXRJCK-UHFFFAOYSA-N 4-methylbenzoyl chloride Chemical compound CC1=CC=C(C(Cl)=O)C=C1 NQUVCRCCRXRJCK-UHFFFAOYSA-N 0.000 description 1
- SJVGFKBLUYAEOK-SFHVURJKSA-N 6-[4-[(3S)-3-(3,5-difluorophenyl)-3,4-dihydropyrazole-2-carbonyl]piperidin-1-yl]pyrimidine-4-carbonitrile Chemical compound FC=1C=C(C=C(C=1)F)[C@@H]1CC=NN1C(=O)C1CCN(CC1)C1=CC(=NC=N1)C#N SJVGFKBLUYAEOK-SFHVURJKSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 101100536354 Drosophila melanogaster tant gene Proteins 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 241000490229 Eucephalus Species 0.000 description 1
- 206010018691 Granuloma Diseases 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 241000283986 Lepus Species 0.000 description 1
- 239000002841 Lewis acid Substances 0.000 description 1
- 101100192716 Mus musculus Purg gene Proteins 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 206010030113 Oedema Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000010933 acylation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 125000003282 alkyl amino group Chemical group 0.000 description 1
- 125000005907 alkyl ester group Chemical group 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 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
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Chemical compound BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- HJMZMZRCABDKKV-UHFFFAOYSA-N carbonocyanidic acid Chemical compound OC(=O)C#N HJMZMZRCABDKKV-UHFFFAOYSA-N 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- HRYZWHHZPQKTII-UHFFFAOYSA-N chloroethane Chemical compound CCCl HRYZWHHZPQKTII-UHFFFAOYSA-N 0.000 description 1
- 239000002026 chloroform extract Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 125000004177 diethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- CQYBWJYIKCZXCN-UHFFFAOYSA-N diethylaluminum Chemical compound CC[Al]CC CQYBWJYIKCZXCN-UHFFFAOYSA-N 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 229960003750 ethyl chloride Drugs 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- TWRQCVNFACGORI-UHFFFAOYSA-N hexane;dihydrochloride Chemical compound Cl.Cl.CCCCCC TWRQCVNFACGORI-UHFFFAOYSA-N 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 150000007517 lewis acids Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 210000002966 serum Anatomy 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 125000001544 thienyl group Chemical group 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D207/00—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D207/02—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D207/30—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members
- C07D207/32—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
- C07D207/33—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms with substituted hydrocarbon radicals, directly attached to ring carbon atoms
- C07D207/337—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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pyrrole Compounds (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Plural Heterocyclic Compounds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US48000974A | 1974-06-17 | 1974-06-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1043340A true CA1043340A (en) | 1978-11-28 |
Family
ID=23906299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA226,261A Expired CA1043340A (en) | 1974-06-17 | 1975-05-05 | Preparation of 5-aroyl-pyrrole compounds |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5134153A (enExample) |
| CA (1) | CA1043340A (enExample) |
| CH (1) | CH614194A5 (enExample) |
| DE (1) | DE2524299C2 (enExample) |
| FR (1) | FR2274614A1 (enExample) |
| GB (1) | GB1503205A (enExample) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5458426U (enExample) * | 1977-09-29 | 1979-04-23 | ||
| GB1592996A (en) * | 1977-10-10 | 1981-07-15 | Rolland Sa A | Acylated pyrrole carboxylic acids and derivatives thereof |
| DE2937249A1 (de) * | 1979-09-14 | 1981-04-30 | Maschinenfabrik Zuckermann Kg, Wien | Kopierbearbeitungsmaschine |
| JPH03111515U (enExample) * | 1989-11-13 | 1991-11-14 | ||
| JPH05149701A (ja) * | 1991-11-27 | 1993-06-15 | Shiro Maruyama | 機械式寸法測定装置 |
| DE19858340A1 (de) * | 1998-12-17 | 2000-06-21 | Merck Patent Gmbh | Verfahren zur Herstellung von 3-Alkanoyl- und 3-Alkylindolen |
-
1975
- 1975-05-05 CA CA226,261A patent/CA1043340A/en not_active Expired
- 1975-05-19 GB GB2131275A patent/GB1503205A/en not_active Expired
- 1975-06-02 DE DE19752524299 patent/DE2524299C2/de not_active Expired
- 1975-06-12 CH CH763075A patent/CH614194A5/xx not_active IP Right Cessation
- 1975-06-12 JP JP7026875A patent/JPS5134153A/ja active Granted
- 1975-06-13 FR FR7518592A patent/FR2274614A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5217029B2 (enExample) | 1977-05-12 |
| JPS5134153A (en) | 1976-03-23 |
| FR2274614A1 (fr) | 1976-01-09 |
| DE2524299A1 (de) | 1975-12-18 |
| GB1503205A (en) | 1978-03-08 |
| FR2274614B1 (enExample) | 1979-04-06 |
| DE2524299C2 (de) | 1982-02-04 |
| CH614194A5 (en) | 1979-11-15 |
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