NO138808B - ANALOGICAL PROCEDURE FOR THE PREPARATION OF THERAPEUTICALLY ACTIVE PREGNANIC ACID DERIVATIVES - Google Patents
ANALOGICAL PROCEDURE FOR THE PREPARATION OF THERAPEUTICALLY ACTIVE PREGNANIC ACID DERIVATIVES Download PDFInfo
- Publication number
- NO138808B NO138808B NO581/72A NO58172A NO138808B NO 138808 B NO138808 B NO 138808B NO 581/72 A NO581/72 A NO 581/72A NO 58172 A NO58172 A NO 58172A NO 138808 B NO138808 B NO 138808B
- Authority
- NO
- Norway
- Prior art keywords
- aluminum
- manganese
- content
- nickel
- tin
- Prior art date
Links
- GWZUYOSMTQIJMY-DIKHCDEOSA-N 2-[(8s,9s,10s,13r,14s,17r)-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1h-cyclopenta[a]phenanthren-17-yl]acetic acid Chemical class C1CCC[C@]2(C)[C@H]3CC[C@](C)([C@H](CC4)CC(O)=O)[C@@H]4[C@@H]3CCC21 GWZUYOSMTQIJMY-DIKHCDEOSA-N 0.000 title abstract 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 34
- 229910052782 aluminium Inorganic materials 0.000 claims description 34
- 229910045601 alloy Inorganic materials 0.000 claims description 31
- 239000000956 alloy Substances 0.000 claims description 31
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 22
- 229910052748 manganese Inorganic materials 0.000 claims description 22
- 239000011572 manganese Substances 0.000 claims description 22
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 10
- 229910052759 nickel Inorganic materials 0.000 claims description 9
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- -1 copper manganese aluminum Chemical compound 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- 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
- C07J7/0095—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of two carbon atoms substituted in position 21 carbon in position 21 is part of carboxylic group
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Rheumatology (AREA)
- Pharmacology & Pharmacy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Animal Behavior & Ethology (AREA)
- Pain & Pain Management (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Steroid Compounds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
Analogifremgangsmåte ved fremstilling av terapeutisk aktive pregnansyrederivater.Analogy method in the preparation of therapeutically active pregnanic acid derivatives.
Description
Legering på kobberbasis. Copper-based alloy.
Denne oppfinnelse angår forbedrede legeringer på kobberbasis, som inneholder mangan, aluminium og jern, samt også nikkel og/eller tinn. This invention relates to improved copper-based alloys containing manganese, aluminum and iron, as well as nickel and/or tin.
I norsk patenskrift nr. 82 056 er det beskrevet en legering som inneholder 10— 15 % mangan, 6,5:—9 % aluminium, 2—4 % jern og 1,5—6 % nikkel, og i norsk patent-skrift nr. 92 676 er det beskrevet en modi-fikasjon av den nevnte legering i hvilken aluminiuminnholdet er under 6,5 %, men ikke under 3,5 %. Disse legeringer har gode støpe- og sveiseegenskaper, samt også gode mekaniske egenskaper. In Norwegian patent document no. 82 056 an alloy containing 10-15% manganese, 6.5:-9% aluminium, 2-4% iron and 1.5-6% nickel is described, and in Norwegian patent document no. 92 676 a modification of the aforementioned alloy is described in which the aluminum content is below 6.5%, but not below 3.5%. These alloys have good casting and welding properties, as well as good mechanical properties.
Oppfinnerne har nå funnet, at gode mekaniske egenskaper kan oppnås ved å benytte manganinnhold på over 15 %, for-utsatt at det anvendes mangan av stor renhet, og. at særdeles gode egenskaper kan. oppnås innenfor et forholdsvis snevert sammensetningsområde av den omtalte art. The inventors have now found that good mechanical properties can be achieved by using a manganese content of over 15%, provided that high purity manganese is used, and. that particularly good properties can. is achieved within a relatively narrow composition range of the mentioned species.
En legering på kobberbasis i henhold til oppfinnelsen har dupleks karakter, idet den hovedsakelig består av en a-fase og en (j-fase, samt inneholder mere enn 15 % og opp til 35 % av meget rent mangan, 3,5— 9,5 % aluminium, 2—4 % jern, ikke over 6 % nikkel og/eller ikke over 2 % tinn, hvor minimumsinnholdet av tinn, når intet nikkel er tilstede, utgjør 0,25 %, mens det samlede minimumsinnhold av nikkel pluss 4 ganger-tinninnholdet er ikke under 1 %, når begge er tilstede, og aluminiumekvivalenten (definert nedenfor) av tilstedeværende aluminium og mangan ligger innenfor området 9—12 %. For de fleste formål vil manganinnholdet ikke være over 20 %, aluminiuminnholdet ikke over 9 % og aluminiumekvivalenten ikke over 11,5 %. A copper-based alloy according to the invention has duplex character, as it mainly consists of an a-phase and a (j-phase, and also contains more than 15% and up to 35% of very pure manganese, 3.5-9, 5% aluminum, 2-4% iron, not more than 6% nickel and/or not more than 2% tin, where the minimum content of tin, when no nickel is present, is 0.25%, while the total minimum content of nickel plus 4 times -the tin content is not less than 1%, when both are present, and the aluminum equivalent (defined below) of the aluminum and manganese present is in the range 9-12%.For most purposes, the manganese content will not exceed 20%, the aluminum content will not exceed 9%, and the aluminum equivalent does not exceed 11.5%.
Legeringer som har en meget god kom-binasjon av egenskaper for fremstilling av støpte gjenstander, f. eks. skipspropeller, vil ha en aluminiumekvivalent på ca. 10 %. Alloys that have a very good combination of properties for the production of cast objects, e.g. ship propellers, will have an aluminum equivalent of approx. 10%.
Innvirkningen av variasjon i manganinnholdet på legeringens struktur og egenskaper er betydelig mindre enn innvirkningen av variasjoner i aluminiuminnholdet, men proporsjonal over hele det om-råde av legeringssammensetninger som kommer i betraktning. Det er derfor mulig å tilsette mangan en aluminiumekvivalent-verdi som ligner den sink-ekvivalentverdi som metallurger benytter for messingtyper som har stor strekkfasthet. Oppfinnerne har funnet, at manganets aluminiumekvivalent i disse kobbermanganaluminiumlegeringer er 0,16, og at denne verdi må antas som basis for de aluminiumekvivalenter som omtales i den foreliggende beskrivelse. Aluminiumekvivalenten av aluminiumet og manganet er lik summen av den virkelige prosientmengde aluminium som er tilstede pluss det aluminium som er ekvivalent med det tilstedeværende mangan. The impact of variation in the manganese content on the alloy's structure and properties is considerably less than the impact of variations in the aluminum content, but proportional over the entire range of alloy compositions that come into consideration. It is therefore possible to add an aluminum equivalent value to manganese that is similar to the zinc equivalent value that metallurgists use for brass types that have high tensile strength. The inventors have found that the aluminum equivalent of the manganese in these copper manganese aluminum alloys is 0.16, and that this value must be assumed as the basis for the aluminum equivalents mentioned in the present description. The aluminum equivalent of the aluminum and manganese is equal to the sum of the actual percent aluminum present plus the aluminum equivalent of the manganese present.
For at de beste mekaniske egenskaper skal fås ved fabrikasjon av skipspropeller er det nødvendig å opprettholde et prak-tisk talt konstant a/(i-forhold i legeringen (ca. 55—60 % a), hvilket kan oppnås ved å minske aluminiuminnholdet, mens manganinnholdet økes. In order for the best mechanical properties to be obtained when manufacturing ship propellers, it is necessary to maintain a practically constant a/(i ratio in the alloy (approx. 55-60% a), which can be achieved by reducing the aluminum content, while the manganese content is increased.
En legering av denne type, som inneholder 15,58 % mangan og 7,46 % aluminium (aluminiumekvivalent 9,95 %) har i luft en utmattingsgrense på ± 16,9 kg/ mm<2>, og i havvann en utmattingsgrense på ± 8,45 kg/mm<2>, basert på 100 000 000 på-kjenningsomvendinger. Denne legering har også vist seg å ha meget stor motstands-evne imot korrosjon. An alloy of this type, which contains 15.58% manganese and 7.46% aluminum (9.95% aluminum equivalent) has in air a fatigue limit of ± 16.9 kg/mm<2>, and in seawater a fatigue limit of ± 8.45 kg/mm<2>, based on 100,000,000 application revolutions. This alloy has also been shown to have a very high resistance to corrosion.
Fot at legeringen skal få nødvendig Foot that the alloy should get necessary
renhet blir det anvendt meget rent mangan, f. eks. elektrolyttisk fremstilt mangan, og senere forurensning av dette unn-gås. Små mengder av kullstoff, over 0,01 % har en merkbar innflytelse på legeringens strekkfasthet, hvilket fremgår av den følgende tabell: purity, very pure manganese is used, e.g. electrolytically produced manganese, and later contamination of this is avoided. Small amounts of carbon, above 0.01%, have a noticeable influence on the tensile strength of the alloy, as can be seen from the following table:
Kullstoffinnholdet bør derfor holdes på under 0,02 %. The carbon content should therefore be kept below 0.02%.
Det i fig. 1 på tegningen viste diagram belyser lavere grenser for aluminium- og manganinnhold i legeringer som har styr-ker på over 478,8 kg/mm<2> (kurvene a resp. b) og forlengelsesverdier på over 25 og 20 % (kurvene c resp. d). That in fig. 1, the diagram shown in the drawing illustrates lower limits for aluminum and manganese content in alloys that have strengths of over 478.8 kg/mm<2> (curves a and b) and elongation values of over 25 and 20% (curves c and .d).
Legeringer som har meget gode egenskaper for spesielt skipspropeller ligger langs en linje som strekker seg fra e (7,6 % aluminium og 15 % mangan) til / (4,4 % aluminium og 35 % mangan). Egenskapene hos tre typiske eksempler på slike legeringer er følgende: Alloys that have very good properties especially for ship propellers lie along a line that extends from e (7.6% aluminum and 15% manganese) to / (4.4% aluminum and 35% manganese). The properties of three typical examples of such alloys are as follows:
Legeringer som skal anvendes til annet enn skipspropeller kan behøve andre kom-binasjoner av egenskaper; noen bør være hårdere og sterkere og andre være mere duktile. Diagrammet på tegningens fig. 2 angir legeringer hvis sammensetning ligger innenfor grensene av parallellogrammet, og som ligger på begge sider av en linje AB (som angir legeringer som har en aluminiumekvivalent på 10), og som har egenskaper som er av betydelig verdi i teknik-ken. Som eksempel anføres nedenfor egenskapene hos to legeringer, av hvilke den ene har stor styrke og den annen stor duktilitet: I alle de ovennevnte eksempler holdes jerninnholdet mellom 2 og 4 % og nikkel-innholdet mellom 0 og 6 %. Disse legeringer har utmerket mot-standsevne mot korrosjon og erosjon, men motstandsevnen kan økes ytterligere ved tilsetning av tinn. Den utstrekning i hvilken dette kan nyttes er begrenset i legeringer som inneholder under 15 % mangan, fordi tilsetningene bevirker tap av duktilitet. Det er blitt funnet, at større mengde tinn kan tilsettes til legeringer, som har høyere manganinnhold, mens det fremdeles opprettholdes stor duktilitet, hvilket fremgår av den følgende tabell: Alloys to be used for things other than ship propellers may need other combinations of properties; some should be harder and stronger and others more ductile. The diagram in the drawing's fig. 2 indicates alloys whose composition lies within the limits of the parallelogram, and which lie on both sides of a line AB (denoting alloys having an aluminum equivalent of 10), and which have properties of considerable value in the art. As an example, the properties of two alloys, one of which has great strength and the other great ductility, are given below: In all the above examples, the iron content is kept between 2 and 4% and the nickel content between 0 and 6%. These alloys have excellent resistance to corrosion and erosion, but the resistance can be further increased by adding tin. The extent to which this can be used is limited in alloys containing less than 15% manganese, because the additions cause a loss of ductility. It has been found that a greater amount of tin can be added to alloys, which have a higher manganese content, while still maintaining great ductility, as can be seen from the following table:
Det kan tilsettes opptil 2 % tinn for å for-bedre korrosjonsmotstanden. Up to 2% tin can be added to improve corrosion resistance.
Noen legeringer, som har liten duktilitet, kan gis en varmebehandling ved lav Some alloys, which have little ductility, can be given a heat treatment at low
temperatur for derved å oppnå kombina-sjoner av meget høy spenning med liten temperature in order to achieve combinations of very high voltage with low
forlengelse og rimelig duktilitet. Det er f. elongation and reasonable ductility. It is f.
eks. mulig å fremstille en legering som har en 0,15 % forlengelse ved en spenning på ca. 62,8 kg/mm<2> og en forlengelse på 3 %. Smidde legeringer av denne type kan var-mebehandles og derved gi utmerkede kom-binasjoner av styrke og duktilitet. Det føl-gende er typisk. e.g. possible to produce an alloy that has a 0.15% elongation at a stress of approx. 62.8 kg/mm<2> and an elongation of 3%. Forged alloys of this type can be heat treated and thereby provide excellent combinations of strength and ductility. The following is typical.
Claims (4)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19712150268 DE2150268C3 (en) | 1971-10-04 | 1971-10-04 | Pregnanic acid derivatives, processes for their preparation and pharmaceuticals containing them |
| DE2204360A DE2204360C2 (en) | 1972-01-27 | 1972-01-27 | New pregnanic acid derivatives, processes for their production and pharmaceutical preparations containing them |
| DE2204361A DE2204361A1 (en) | 1972-01-27 | 1972-01-27 | 3, 20-dioxo-pregnene and pregnadiene 21-acids - antiinflammatories for topical application |
| DE2204358A DE2204358C2 (en) | 1972-01-27 | 1972-01-27 | Process for the preparation of pregnanic acid derivatives |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO138808B true NO138808B (en) | 1978-08-07 |
| NO138808C NO138808C (en) | 1978-11-15 |
Family
ID=27431338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO581/72A NO138808C (en) | 1971-10-04 | 1972-02-25 | ANALOGICAL PROCEDURE FOR THE PREPARATION OF THERAPEUTICALLY ACTIVE PREGNANIC ACID DERIVATIVES |
Country Status (18)
| Country | Link |
|---|---|
| JP (1) | JPS5837320B2 (en) |
| BE (1) | BE779869A (en) |
| CA (1) | CA978518A (en) |
| CH (2) | CH589671A5 (en) |
| DD (1) | DD95565B1 (en) |
| DK (1) | DK136612C (en) |
| EG (1) | EG10635A (en) |
| FI (1) | FI51103C (en) |
| FR (1) | FR2156518B1 (en) |
| GB (1) | GB1387911A (en) |
| HU (1) | HU165261B (en) |
| IE (1) | IE36120B1 (en) |
| IL (1) | IL39735A (en) |
| LU (1) | LU66213A1 (en) |
| NL (1) | NL179059C (en) |
| NO (1) | NO138808C (en) |
| RO (2) | RO70725A (en) |
| YU (1) | YU35148B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IE38659B1 (en) * | 1972-12-22 | 1978-05-10 | Schering Ag | New pregnane acid derivatives |
| DE2444618C2 (en) * | 1974-09-16 | 1984-01-19 | Schering AG, 1000 Berlin und 4709 Bergkamen | New Pregnan-21-Acid-Derivatives |
| DE2365102C2 (en) * | 1973-12-21 | 1982-12-02 | Schering Ag, 1000 Berlin Und 4619 Bergkamen | New pregnanic acid derivatives |
| DE2332663C2 (en) * | 1973-06-23 | 1986-07-31 | Schering AG, 1000 Berlin und 4709 Bergkamen | Use of corticosteroid active ingredients for inhalation therapy |
| DE2336438C2 (en) * | 1973-07-14 | 1983-07-07 | Schering Ag, 1000 Berlin Und 4619 Bergkamen | Process for making 17β-oxalyl steroids |
| EP0006090B1 (en) * | 1978-06-12 | 1982-09-01 | Schering Aktiengesellschaft | New corticoids, processes for their preparation and pharmaceutical compositions containing them |
| SE8506015D0 (en) * | 1985-12-19 | 1985-12-19 | Draco Ab | NOVEL 16,17-ACETALSUBSTITUTED PREGNANE 21-OIC ACID DERIVATIVES |
| US5215979A (en) * | 1985-12-19 | 1993-06-01 | Aktiebolaget Draco | 16,17-acetalsubstituted pregnane 21-oic acid derivatives |
| JP2007237153A (en) * | 2006-03-06 | 2007-09-20 | Npo Machinami Ikuseikai | Air mixing and agitation technology |
-
1972
- 1972-02-23 DD DD72161068A patent/DD95565B1/en unknown
- 1972-02-23 GB GB829972A patent/GB1387911A/en not_active Expired
- 1972-02-23 YU YU443/72A patent/YU35148B/en unknown
- 1972-02-24 CH CH264772A patent/CH589671A5/xx not_active IP Right Cessation
- 1972-02-24 CH CH395876A patent/CH588509A5/xx not_active IP Right Cessation
- 1972-02-24 IE IE227/72A patent/IE36120B1/en unknown
- 1972-02-24 DK DK86472A patent/DK136612C/en not_active IP Right Cessation
- 1972-02-24 EG EG69/72A patent/EG10635A/en active
- 1972-02-25 FR FR7206522A patent/FR2156518B1/fr not_active Expired
- 1972-02-25 FI FI720497A patent/FI51103C/en active
- 1972-02-25 BE BE779869A patent/BE779869A/en not_active IP Right Cessation
- 1972-02-25 NO NO581/72A patent/NO138808C/en unknown
- 1972-06-21 IL IL39735A patent/IL39735A/en unknown
- 1972-06-21 HU HUSCHE398*1A patent/HU165261B/hu not_active IP Right Cessation
- 1972-10-02 LU LU66213A patent/LU66213A1/xx unknown
- 1972-10-03 RO RO7284617A patent/RO70725A/en unknown
- 1972-10-03 RO RO7272410A patent/RO71183A/en unknown
- 1972-10-04 JP JP47100273A patent/JPS5837320B2/en not_active Expired
- 1972-10-04 CA CA153,227A patent/CA978518A/en not_active Expired
- 1972-10-04 NL NLAANVRAGE7213456,A patent/NL179059C/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CA978518A (en) | 1975-11-25 |
| CH588509A5 (en) | 1977-06-15 |
| JPS5837320B2 (en) | 1983-08-15 |
| RO71183B (en) | 1983-07-30 |
| GB1387911A (en) | 1975-03-19 |
| RO71183A (en) | 1983-08-03 |
| FI51103B (en) | 1976-06-30 |
| NL179059C (en) | 1986-07-01 |
| IL39735A0 (en) | 1972-12-29 |
| HU165261B (en) | 1974-07-27 |
| BE779869A (en) | 1972-08-25 |
| IE36120L (en) | 1973-04-04 |
| RO70725A (en) | 1982-09-09 |
| FI51103C (en) | 1976-10-11 |
| YU35148B (en) | 1980-09-25 |
| NL179059B (en) | 1986-02-03 |
| NL7213456A (en) | 1973-04-06 |
| YU44372A (en) | 1980-03-15 |
| IL39735A (en) | 1975-08-31 |
| IE36120B1 (en) | 1976-08-18 |
| LU66213A1 (en) | 1973-01-23 |
| FR2156518A1 (en) | 1973-06-01 |
| EG10635A (en) | 1976-09-30 |
| NO138808C (en) | 1978-11-15 |
| DD95565A5 (en) | 1973-02-12 |
| JPS4861464A (en) | 1973-08-28 |
| FR2156518B1 (en) | 1975-06-13 |
| DD95565B1 (en) | 1986-10-29 |
| CH589671A5 (en) | 1977-07-15 |
| DK136612B (en) | 1977-10-31 |
| DK136612C (en) | 1978-04-10 |
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