CS149090A2 - Method of peptidoglycan's monomer's n-acyl derivatives preparation - Google Patents
Method of peptidoglycan's monomer's n-acyl derivatives preparation Download PDFInfo
- Publication number
- CS149090A2 CS149090A2 CS901490A CS149090A CS149090A2 CS 149090 A2 CS149090 A2 CS 149090A2 CS 901490 A CS901490 A CS 901490A CS 149090 A CS149090 A CS 149090A CS 149090 A2 CS149090 A2 CS 149090A2
- Authority
- CS
- Czechoslovakia
- Prior art keywords
- pgm
- formula
- acid
- derivatives
- acyl
- Prior art date
Links
- 238000002360 preparation method Methods 0.000 title claims description 12
- 238000000034 method Methods 0.000 title claims description 8
- MSFSPUZXLOGKHJ-UHFFFAOYSA-N Muraminsaeure Natural products OC(=O)C(C)OC1C(N)C(O)OC(CO)C1O MSFSPUZXLOGKHJ-UHFFFAOYSA-N 0.000 title description 7
- 108010013639 Peptidoglycan Proteins 0.000 title description 7
- 239000000178 monomer Substances 0.000 title description 7
- 239000002253 acid Substances 0.000 claims description 11
- -1 alkyl carboxylic acid Chemical class 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 150000002148 esters Chemical class 0.000 claims description 6
- 125000002252 acyl group Chemical group 0.000 claims description 5
- 150000008064 anhydrides Chemical class 0.000 claims description 2
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 claims description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims 1
- 108090000765 processed proteins & peptides Proteins 0.000 claims 1
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 35
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 30
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 23
- 239000000047 product Substances 0.000 description 19
- 159000000000 sodium salts Chemical class 0.000 description 15
- 239000002904 solvent Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 13
- 239000000203 mixture Substances 0.000 description 13
- 235000019439 ethyl acetate Nutrition 0.000 description 12
- 210000000952 spleen Anatomy 0.000 description 12
- 210000004698 lymphocyte Anatomy 0.000 description 11
- 239000002244 precipitate Substances 0.000 description 10
- 150000003839 salts Chemical class 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000001228 spectrum Methods 0.000 description 7
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 6
- 241000699670 Mus sp. Species 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 238000002329 infrared spectrum Methods 0.000 description 5
- 239000000741 silica gel Substances 0.000 description 5
- 229910002027 silica gel Inorganic materials 0.000 description 5
- 229910052708 sodium Inorganic materials 0.000 description 5
- 239000011734 sodium Substances 0.000 description 5
- 125000004432 carbon atom Chemical group C* 0.000 description 4
- 125000000400 lauroyl group Chemical group O=C([*])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 150000007530 organic bases Chemical class 0.000 description 4
- 238000010898 silica gel chromatography Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 101100382386 Arabidopsis thaliana PPC3 gene Proteins 0.000 description 3
- QOSSAOTZNIDXMA-UHFFFAOYSA-N Dicylcohexylcarbodiimide Chemical compound C1CCCCC1N=C=NC1CCCCC1 QOSSAOTZNIDXMA-UHFFFAOYSA-N 0.000 description 3
- 206010028980 Neoplasm Diseases 0.000 description 3
- 101100382400 Solanum tuberosum PPC1 gene Proteins 0.000 description 3
- 101100112137 Zea mays PEP1 gene Proteins 0.000 description 3
- 230000010933 acylation Effects 0.000 description 3
- 238000005917 acylation reaction Methods 0.000 description 3
- 125000003236 benzoyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C(*)=O 0.000 description 3
- 201000011510 cancer Diseases 0.000 description 3
- 210000004027 cell Anatomy 0.000 description 3
- 230000004727 humoral immunity Effects 0.000 description 3
- 125000002801 octanoyl group Chemical group C(CCCCCCC)(=O)* 0.000 description 3
- 229920000379 polypropylene carbonate Polymers 0.000 description 3
- 101150023641 ppc gene Proteins 0.000 description 3
- 238000002300 pressure perturbation calorimetry Methods 0.000 description 3
- YQTCQNIPQMJNTI-UHFFFAOYSA-N 2,2-dimethylpropan-1-one Chemical group CC(C)(C)[C]=O YQTCQNIPQMJNTI-UHFFFAOYSA-N 0.000 description 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 2
- XOGXLUAMJUQURP-UHFFFAOYSA-N 3-hydroxy-2h-1,3-benzothiazole Chemical compound C1=CC=C2N(O)CSC2=C1 XOGXLUAMJUQURP-UHFFFAOYSA-N 0.000 description 2
- 229920005654 Sephadex Polymers 0.000 description 2
- 239000012507 Sephadex™ Substances 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 125000000218 acetic acid group Chemical group C(C)(=O)* 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000004071 biological effect Effects 0.000 description 2
- 150000001718 carbodiimides Chemical class 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004587 chromatography analysis Methods 0.000 description 2
- 239000012043 crude product Substances 0.000 description 2
- 230000002519 immonomodulatory effect Effects 0.000 description 2
- 230000001571 immunoadjuvant effect Effects 0.000 description 2
- 239000000568 immunological adjuvant Substances 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000008194 pharmaceutical composition Substances 0.000 description 2
- 125000003696 stearoyl group Chemical group O=C([*])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 238000004809 thin layer chromatography Methods 0.000 description 2
- IARVPDWLYVZCIN-UHFFFAOYSA-N (2,5-dioxopyrrolidin-1-yl) 2,2-dimethylpropanoate Chemical compound CC(C)(C)C(=O)ON1C(=O)CCC1=O IARVPDWLYVZCIN-UHFFFAOYSA-N 0.000 description 1
- BVUOEDOMUOJKOY-UHFFFAOYSA-N (2,5-dioxopyrrolidin-1-yl) benzoate Chemical compound C=1C=CC=CC=1C(=O)ON1C(=O)CCC1=O BVUOEDOMUOJKOY-UHFFFAOYSA-N 0.000 description 1
- ASOKPJOREAFHNY-UHFFFAOYSA-N 1-Hydroxybenzotriazole Chemical compound C1=CC=C2N(O)N=NC2=C1 ASOKPJOREAFHNY-UHFFFAOYSA-N 0.000 description 1
- MRFGGHFXDUXEAG-UHFFFAOYSA-N 2-(2,5-dioxopyrrolidin-1-yl)octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCC(C(O)=O)N1C(=O)CCC1=O MRFGGHFXDUXEAG-UHFFFAOYSA-N 0.000 description 1
- CFMZSMGAMPBRBE-UHFFFAOYSA-N 2-hydroxyisoindole-1,3-dione Chemical compound C1=CC=C2C(=O)N(O)C(=O)C2=C1 CFMZSMGAMPBRBE-UHFFFAOYSA-N 0.000 description 1
- 238000011749 CBA mouse Methods 0.000 description 1
- 101000583553 Homo sapiens Phosphoglucomutase-1 Proteins 0.000 description 1
- 206010022998 Irritability Diseases 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 241000699666 Mus <mouse, genus> Species 0.000 description 1
- 102100030999 Phosphoglucomutase-1 Human genes 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 238000000692 Student's t-test Methods 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- WORJEOGGNQDSOE-UHFFFAOYSA-N chloroform;methanol Chemical compound OC.ClC(Cl)Cl WORJEOGGNQDSOE-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004440 column chromatography Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- AAOVKJBEBIDNHE-UHFFFAOYSA-N diazepam Chemical compound N=1CC(=O)N(C)C2=CC=C(Cl)C=C2C=1C1=CC=CC=C1 AAOVKJBEBIDNHE-UHFFFAOYSA-N 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000003937 drug carrier Substances 0.000 description 1
- 230000000212 effect on lymphocytes Effects 0.000 description 1
- WHQLQYRFIHPMNA-UHFFFAOYSA-N ethyl acetate;oxolane Chemical compound C1CCOC1.CCOC(C)=O WHQLQYRFIHPMNA-UHFFFAOYSA-N 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 125000002566 glucosaminyl group Chemical group 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- NPZTUJOABDZTLV-UHFFFAOYSA-N hydroxybenzotriazole Substances O=C1C=CC=C2NNN=C12 NPZTUJOABDZTLV-UHFFFAOYSA-N 0.000 description 1
- 230000001900 immune effect Effects 0.000 description 1
- 230000028993 immune response Effects 0.000 description 1
- 210000000987 immune system Anatomy 0.000 description 1
- 230000001031 immunopharmacological effect Effects 0.000 description 1
- 230000003308 immunostimulating effect Effects 0.000 description 1
- 239000012442 inert solvent Substances 0.000 description 1
- 238000001990 intravenous administration Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000013642 negative control Substances 0.000 description 1
- 238000000655 nuclear magnetic resonance spectrum Methods 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 229940049964 oleate Drugs 0.000 description 1
- 125000002811 oleoyl group Chemical group O=C([*])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])/C([H])=C([H])\C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001312 palmitoyl group Chemical group O=C([*])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000013641 positive control Substances 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- KIDBBTHHMJOMAU-UHFFFAOYSA-N propan-1-ol;hydrate Chemical compound O.CCCO KIDBBTHHMJOMAU-UHFFFAOYSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K9/00—Peptides having up to 20 amino acids, containing saccharide radicals and having a fully defined sequence; Derivatives thereof
- C07K9/001—Peptides having up to 20 amino acids, containing saccharide radicals and having a fully defined sequence; Derivatives thereof the peptide sequence having less than 12 amino acids and not being part of a ring structure
- C07K9/005—Peptides having up to 20 amino acids, containing saccharide radicals and having a fully defined sequence; Derivatives thereof the peptide sequence having less than 12 amino acids and not being part of a ring structure containing within the molecule the substructure with m, n > 0 and m+n > 0, A, B, D, E being heteroatoms; X being a bond or a chain, e.g. muramylpeptides
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P37/00—Drugs for immunological or allergic disorders
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Molecular Biology (AREA)
- Genetics & Genomics (AREA)
- Biophysics (AREA)
- Biochemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Immunology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Pharmacology & Pharmacy (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Animal Behavior & Ethology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Engineering & Computer Science (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Peptides Or Proteins (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| YU00626/89A YU62689A (en) | 1989-03-27 | 1989-03-27 | N-acyl derivatives of peptidoglican monomer, their pharmaceutically acceptable salts, process for preparing thereof and their use as immunity modulators and immunoadjuvant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CS149090A2 true CS149090A2 (en) | 1991-08-13 |
Family
ID=25550749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS901490A CS149090A2 (en) | 1989-03-27 | 1990-03-27 | Method of peptidoglycan's monomer's n-acyl derivatives preparation |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US5153173A (hu) |
| EP (1) | EP0390039A3 (hu) |
| JP (1) | JPH04193898A (hu) |
| BG (1) | BG51456A3 (hu) |
| CA (1) | CA2013065A1 (hu) |
| CS (1) | CS149090A2 (hu) |
| DD (1) | DD296085A5 (hu) |
| HU (1) | HU202546B (hu) |
| PL (1) | PL162969B1 (hu) |
| RO (1) | RO105699B1 (hu) |
| RU (1) | RU1779258C (hu) |
| YU (1) | YU62689A (hu) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE125270T1 (de) * | 1990-12-21 | 1995-08-15 | Pliva Pharm & Chem Works | Tert-butyloxycarbonyl-l-tyrosyl- peptidoglycanmonomer und deren 125 i-markiertes derivat, deren herstellung und verwendung. |
| CA2115270A1 (en) * | 1991-08-15 | 1993-03-04 | Biserka Radosevic-Stasic | The use of the peptidoglycan monomer (pgm), its n-acyl derivatives, and its metal complexes in the preparation of medicaments for the correction of the immunosuppressive and hepatosuppressive states of the organism |
| AU2574199A (en) | 1998-02-02 | 1999-08-16 | Princeton University | Substrate analogs for murg, methods of making same and assays using same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| YU40472B (en) * | 1977-03-22 | 1986-02-28 | Pliva Pharm & Chem Works | Process for obtaining the basic repeated disaccharide-pentapeptide unit of peptidoglycane from the peptidoglycane complex generated in the submersion culturing of microorganisms |
| JPS58198496A (ja) * | 1982-05-14 | 1983-11-18 | Dainippon Pharmaceut Co Ltd | グルコサミニルムラミルペプチド誘導体 |
| YU45382B (en) * | 1986-11-19 | 1992-05-28 | Pliva Sour Zagreb | Process for preparing complex of n-acethyl-glucosis-aminyl-n-acethyl-muramoil-l-alanyl-d-izoglutaminyl-(l)-mezodiaminopimelyl-(d-amid)-(l)-al |
-
1989
- 1989-03-27 YU YU00626/89A patent/YU62689A/xx unknown
-
1990
- 1990-03-26 RU SU904743571A patent/RU1779258C/ru active
- 1990-03-26 CA CA002013065A patent/CA2013065A1/en not_active Abandoned
- 1990-03-26 EP EP19900105723 patent/EP0390039A3/en not_active Withdrawn
- 1990-03-26 HU HU901831A patent/HU202546B/hu not_active IP Right Cessation
- 1990-03-26 DD DD90339076A patent/DD296085A5/de not_active IP Right Cessation
- 1990-03-27 RO RO144579A patent/RO105699B1/ro unknown
- 1990-03-27 CS CS901490A patent/CS149090A2/cs unknown
- 1990-03-27 US US07/499,586 patent/US5153173A/en not_active Expired - Fee Related
- 1990-03-27 PL PL28448190A patent/PL162969B1/pl unknown
- 1990-03-27 BG BG91592A patent/BG51456A3/xx unknown
- 1990-03-27 JP JP2075786A patent/JPH04193898A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0390039A3 (en) | 1991-11-13 |
| YU62689A (en) | 1991-02-28 |
| PL162969B1 (en) | 1994-01-31 |
| CA2013065A1 (en) | 1990-09-27 |
| BG51456A3 (en) | 1993-05-14 |
| HU901831D0 (en) | 1990-08-28 |
| RU1779258C (ru) | 1992-11-30 |
| RO105699B1 (ro) | 1992-11-30 |
| EP0390039A2 (en) | 1990-10-03 |
| JPH04193898A (ja) | 1992-07-13 |
| HU202546B (en) | 1991-03-28 |
| DD296085A5 (de) | 1991-11-21 |
| US5153173A (en) | 1992-10-06 |
| HUT53661A (en) | 1990-11-28 |
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