BE635251A - - Google Patents
Info
- Publication number
- BE635251A BE635251A BE635251DA BE635251A BE 635251 A BE635251 A BE 635251A BE 635251D A BE635251D A BE 635251DA BE 635251 A BE635251 A BE 635251A
- Authority
- BE
- Belgium
- Prior art keywords
- verrucarin
- hexahydro
- hydrogenation
- fungi
- desc
- Prior art date
Links
- NLUGUZJQJYVUHS-IDXDZYHTSA-N verrucarin A Chemical compound C([C@@]12[C@@]3(C)[C@@]45CCC(C)=C[C@H]4O[C@@H]1C[C@H]3OC(=O)\C=C/C=C/C(=O)OCC[C@H]([C@@H](C(=O)OC5)O)C)O2 NLUGUZJQJYVUHS-IDXDZYHTSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 230000002829 reduced Effects 0.000 claims description 4
- 238000009903 catalytic hydrogenation reaction Methods 0.000 claims description 3
- 238000005984 hydrogenation reaction Methods 0.000 claims description 2
- MUMZUERVLWJKNR-UHFFFAOYSA-N oxoplatinum Chemical compound [Pt]=O MUMZUERVLWJKNR-UHFFFAOYSA-N 0.000 claims description 2
- 229910003446 platinum oxide Inorganic materials 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 241000233866 Fungi Species 0.000 description 3
- WVDDGKGOMKODPV-UHFFFAOYSA-N benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- HVYWMOMLDIMFJA-DPAQBDIFSA-N (3β)-Cholest-5-en-3-ol Chemical compound C1C=C2C[C@@H](O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2 HVYWMOMLDIMFJA-DPAQBDIFSA-N 0.000 description 2
- 241001099903 Paramyrothecium roridum Species 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 239000012531 culture fluid Substances 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 239000000825 pharmaceutical preparation Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 210000004881 tumor cells Anatomy 0.000 description 2
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 1
- 244000215068 Acacia senegal Species 0.000 description 1
- 229960000583 Acetic Acid Drugs 0.000 description 1
- YKIOKAURTKXMSB-UHFFFAOYSA-N Adams's catalyst Chemical compound O=[Pt]=O YKIOKAURTKXMSB-UHFFFAOYSA-N 0.000 description 1
- 241001103808 Albifimbria verrucaria Species 0.000 description 1
- 229940064005 Antibiotic throat preparations Drugs 0.000 description 1
- 229940083879 Antibiotics FOR TREATMENT OF HEMORRHOIDS AND ANAL FISSURES FOR TOPICAL USE Drugs 0.000 description 1
- 229940042052 Antibiotics for systemic use Drugs 0.000 description 1
- 229940042786 Antitubercular Antibiotics Drugs 0.000 description 1
- 229940107161 Cholesterol Drugs 0.000 description 1
- 241001300514 Eua Species 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 229920000084 Gum arabic Polymers 0.000 description 1
- 229940093922 Gynecological Antibiotics Drugs 0.000 description 1
- GUBGYTABKSRVRQ-UUNJERMWSA-N Lactose Natural products O([C@@H]1[C@H](O)[C@H](O)[C@H](O)O[C@@H]1CO)[C@H]1[C@@H](O)[C@@H](O)[C@H](O)[C@H](CO)O1 GUBGYTABKSRVRQ-UUNJERMWSA-N 0.000 description 1
- 208000006971 Mastocytoma Diseases 0.000 description 1
- 241000223251 Myrothecium Species 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 239000004264 Petrolatum Substances 0.000 description 1
- 229940066842 Petrolatum Drugs 0.000 description 1
- 229910019020 PtO2 Inorganic materials 0.000 description 1
- 239000007868 Raney catalyst Substances 0.000 description 1
- 229910000564 Raney nickel Inorganic materials 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 229940024982 Topical Antifungal Antibiotics Drugs 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000205 acacia gum Substances 0.000 description 1
- 235000010489 acacia gum Nutrition 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 1
- 231100000403 acute toxicity Toxicity 0.000 description 1
- 238000005377 adsorption chromatography Methods 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 235000019445 benzyl alcohol Nutrition 0.000 description 1
- 230000003115 biocidal Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 210000004027 cells Anatomy 0.000 description 1
- 235000012000 cholesterol Nutrition 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 230000001085 cytostatic Effects 0.000 description 1
- SPGAMGILENUIOF-UHFFFAOYSA-N dioxoplatinum;hydrate Chemical compound O.O=[Pt]=O SPGAMGILENUIOF-UHFFFAOYSA-N 0.000 description 1
- 239000008298 dragée Substances 0.000 description 1
- 229940079593 drugs Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000012362 glacial acetic acid Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000008011 inorganic excipient Substances 0.000 description 1
- 230000000749 insecticidal Effects 0.000 description 1
- 229940079866 intestinal antibiotics Drugs 0.000 description 1
- 238000001990 intravenous administration Methods 0.000 description 1
- GUBGYTABKSRVRQ-XLOQQCSPSA-N lactose Chemical compound O[C@@H]1[C@@H](O)[C@@H](O)[C@@H](CO)O[C@H]1O[C@@H]1[C@@H](CO)O[C@H](O)[C@H](O)[C@H]1O GUBGYTABKSRVRQ-XLOQQCSPSA-N 0.000 description 1
- 239000008101 lactose Substances 0.000 description 1
- 230000000670 limiting Effects 0.000 description 1
- 235000019359 magnesium stearate Nutrition 0.000 description 1
- 201000006512 mast cell neoplasm Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L na2so4 Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229940005935 ophthalmologic Antibiotics Drugs 0.000 description 1
- 239000008012 organic excipient Substances 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 238000004810 partition chromatography Methods 0.000 description 1
- 230000000737 periodic Effects 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 235000019271 petrolatum Nutrition 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920001515 polyalkylene glycol Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002335 preservative Effects 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000001187 sodium carbonate Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000829 suppository Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000003826 tablet Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 230000001225 therapeutic Effects 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07G—COMPOUNDS OF UNKNOWN CONSTITUTION
- C07G11/00—Antibiotics
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Pharmacology & Pharmacy (AREA)
- Steroid Compounds (AREA)
Description
<Desc/Clms Page number 1>
Procédé d'isolement d'un nouveau composé.
La présente invention a pour objet un nouveau dérivé de la verrucarine A, à savoir l'hexahydro-verrucarine A.
L'invention concerne également un procédé de préparation de ce composé jusque présent inconnu, procédé selon lequel on réduit la verrucarine A en hexahydro-verrucarine A. La réduction se fait par hydrogénation catalytique- Comme catalyseurs convena- bles on peut utiliser des métaux du huitième groupe de la classi- fication périodique, par exemple le platine, le palladium ou le nickel. Cette hydrogénation catalytique est de préférence effectuée en présence d'oxyde de platine, quoique l'on puisse aussi opérer avec le nickel de Raney.
L'hydrogénation peut se faire à la température ambiante ou à température élevée, sous la pression atmo&phérique ou sous une
<Desc/Clms Page number 2>
pression plus élevée.
Le corps de départ, c'est-à-dire la verrucarine A, peut être obtenue à partir des liquides de culture et/ou des mycéliums de souches des mycètes Myrothecium verrucaria (Albertini et Schweinitz) Di tmar x Fries et Myrothecium roridum Tode ex Pries.
Par extraction on obtient un mélange de plusieurs antibiotiques, mélange que l'on peut séparer en ses composantes par précipitation, répartition, chromatographie d'adsorption, chromatographie de par- tage ou répartition à contre-courant (répartition fractionnée).
Comme matière de départ on peut toutefois utiliser non seulement le liquide de culture et/ou le mycélium de souches des deux mycètes mentionnés ci-.dessus; mais également le liquide de culture et le mycélium de variante :quelconques de ces organismes.
On a isolé des colonies des mycètes Myrothecium verrucaris et Myrothecium roridum à partir d'échantillons de sols d'origines très diverses. Au point de vue morphologique, toutes ces souches correspondent aux descriptions des espèces, telles qu'elles sont données par exemple dans Gilman, J.C., A Manual ofSoil Fungi, 2ème éd., (1957), The Iowa State Collège Press, Ames, Iowa, E.U.A. Elles peuvent être cultivées sur des milieux nutritifs très variés avec les autres mycètes.
L'hexahydro-verrucarine A a une forte activité antimito- tique et elle peut donc être utilisée en thérapeutique pour com- battre les tumeurs.' t'action cytostatique de l'hexahydro-verrucarine A a été déterminée in vitro, sur le mastocytome P 815 de la sourie, par l'inhibition qu'elle exerce sur la multiplication des cellules tumorales.
On a obtenu les résultats indiqués ci-dessous :
Dans une solution nutritive appropriée, ces cellules tumorales se multiplient en 40 heures jusqu'à atteindre 4 à 5 fois leur nombre de départe La DE-50 (concentration qui inhibe de 50% cette multiplication) de l'hexahydro-verrucarine A, par rapport à ces cellules, est de 0,05 /ug/ml. Sur la souris blanche, par voie intraveineuse, la toxicité aiguë de l'hexahydro-verrucarine A, exprimée par la DL-50., est de 17 mg/kg.
<Desc/Clms Page number 3>
EMI3.1
En outre, 1$herahydroé-verrucarine A ne signale par son action insecticide et c'est pourquoi elle peut également trouver des applications comme pesticide. . @ @
EMI3.2
L'hexahydro-verrucar1ne A peut être utilisée comme médi- cament, par exemple sous forme de préparations pharmaceutiques.
Celles-ci contiennent le composé mentionné en mélange avec un exci- pient minéral ou organique approprié pour l'administration par voie entérale, parentérale ou locale. Comme excipients on peut envisager des corps qui ne réagissent pas avec le nouveau composé, par exem- ple la gélatine, le lactose, l'amidon, le stéarate de magnésium, le talc, des huiles végétales, l'alcool benzylique, la gomme arabique, des polyalkylèneglycols, la vaseline, le cholestérol ou d'autres matières supports connues pour médicaments.
Les préparations pharma- ceutiques peuvent être présentées par exemple sous forme de compri- més, de dragées de poudres, de crèmes ou de suppositoires, ou à l'état liquide sous forme de solutions, de suspensions ou d'émul- sions. S'il y a lieu on peut les stériliser et/ou leur adjoindre des corps auxiliaires, tels que des agents de conservation, des stabi-
EMI3.3
luisants, des mouillants ou des émulsionnant. Elles peuvent égale- ment contenir d'autres corps doués d'activités thérapeutiques.
L'exemple suivant illustre la présente invention sans aucunement en limiter la portée.
EMI3.4
E'X 1 -'l P L leel Hexahydn-verrucarine A,
En présence de 240 mg de PtO2.H2O on hydrogène à 20 C, sous une légère surpression ou sous la pression normale, une solu-
EMI3.5
tion de 2,045 g de verrucarine A dans 100 ml d'acide acétique gla- cial:la quantité d'hydrogène absorbée correspond alors à 3,2 moles de H2 (par rapport à la verrucarine A). On élimine PtO2 par filtra- tion, on évapore le filtrat soua pression réduite, on reprend le résidu dans du chloroforme, on lave une première fois avec une solu- tion binormale de carbonate de sodium, puis avec de l'eau, on sèche sur sulfate de sodium et on chasse le solvant par évaporation sous pression réduite.
Après recristallisation du résidu dans un
<Desc/Clms Page number 4>
mélange 1: 1: 1: d'acétone, d'éther et d'éther de pétrole on ob-
EMI4.1
tient l'hexahydro-verrucar1ne A qui fond à 113-115.C. CoJ2 m + 2A* + 20 (o * 1#15 dans le chloroforme). Spectre infra-
EMI4.2
rouge (dans CH2C12 et KDr) 1 bandes à 2,73 lU; 2,S2 lUI 3,41 lU. gvo /u; 5,76 /u; 5080 /u; 8,00 lUI 8,24 /u; bzz ui z8 lU) 8,70 u; 8,85 u 9,16 /u; 9,71 /u; 10,31 /u et 10,58 a. De
EMI4.3
l'ultraviolet on n'observe pas d'absorption Bêlective,La détermina- tion thermoélectrique du poids moléculaire donne 510 ¯ 10 (dans le
EMI4.4
dichlorooéthane valeur calculée ï 508,6).
<Desc / Clms Page number 1>
A method of isolating a new compound.
The present invention relates to a new derivative of verrucarin A, namely hexahydro-verrucarin A.
The invention also relates to a process for the preparation of this hitherto unknown compound, a process according to which verrucarin A is reduced to hexahydro-verrucarin A. The reduction takes place by catalytic hydrogenation. Suitable catalysts can be used as eighth metals. group of the periodic classification, for example platinum, palladium or nickel. This catalytic hydrogenation is preferably carried out in the presence of platinum oxide, although it is also possible to operate with Raney nickel.
The hydrogenation can be carried out at room temperature or at elevated temperature, under atmospheric pressure or under a
<Desc / Clms Page number 2>
higher pressure.
The starting body, i.e. verrucarin A, can be obtained from culture fluids and / or mycelia of strains of the fungi Myrothecium verrucaria (Albertini and Schweinitz) Di tmar x Fries and Myrothecium roridum Tode ex Pries.
By extraction, a mixture of several antibiotics is obtained, a mixture which can be separated into its components by precipitation, distribution, adsorption chromatography, partition chromatography or countercurrent distribution (fractional distribution).
As starting material, however, it is not only possible to use the culture liquid and / or the mycelium of strains of the two fungi mentioned above; but also the culture fluid and the variant mycelium: any of these organisms.
Colonies of the fungi Myrothecium verrucaris and Myrothecium roridum have been isolated from soil samples of a wide variety of origins. Morphologically, all these strains correspond to the descriptions of the species, as given for example in Gilman, JC, A Manual of Soil Fungi, 2nd ed., (1957), The Iowa State College Press, Ames, Iowa , EUA They can be grown on a wide variety of nutrient media with other fungi.
Hexahydro-verrucarin A has strong antimititic activity and therefore can be used therapeutically to fight tumors. the cytostatic action of hexahydro-verrucarin A was determined in vitro on mastocytoma P 815 of the mouse, by the inhibition it exerts on the multiplication of tumor cells.
The results shown below were obtained:
In an appropriate nutrient solution, these tumor cells multiply in 40 hours until they reach 4 to 5 times their number depending on the DE-50 (concentration which inhibits this multiplication by 50%) of hexahydro-verrucarin A, compared to to these cells, is 0.05 µg / ml. In white mice, by the intravenous route, the acute toxicity of hexahydro-verrucarin A, expressed by the LD-50., Is 17 mg / kg.
<Desc / Clms Page number 3>
EMI3.1
In addition, 1 $ herahydroe-verrucarin A does not signal its insecticidal action and therefore it may also find applications as a pesticide. . @ @
EMI3.2
Hexahydro-verrucarin A can be used as a medicament, for example in the form of pharmaceutical preparations.
These contain the mentioned compound in admixture with an inorganic or organic excipient suitable for enteral, parenteral or local administration. As excipients, one can envisage bodies which do not react with the new compound, for example gelatin, lactose, starch, magnesium stearate, talc, vegetable oils, benzyl alcohol, gum arabic. , polyalkylene glycols, petrolatum, cholesterol or other known carrier materials for drugs.
The pharmaceutical preparations can be presented, for example, in the form of tablets, dragees, powders, creams or suppositories, or in the liquid state in the form of solutions, suspensions or emulsions. If necessary, they can be sterilized and / or added to them with auxiliary substances, such as preservatives, stabilizers.
EMI3.3
glitters, wetting agents or emulsifiers. They can also contain other bodies endowed with therapeutic activities.
The following example illustrates the present invention without in any way limiting its scope.
EMI3.4
E'X 1 -'l P L leel Hexahydn-verrucarin A,
In the presence of 240 mg of PtO2.H2O is hydrogenated at 20 C, under a slight overpressure or under normal pressure, a solution
EMI3.5
tion of 2.045 g of verrucarin A in 100 ml of glacial acetic acid: the quantity of hydrogen absorbed then corresponds to 3.2 moles of H2 (relative to verrucarin A). PtO2 is removed by filtration, the filtrate is evaporated under reduced pressure, the residue is taken up in chloroform, washed a first time with a binormal solution of sodium carbonate, then with water and dried over. sodium sulfate and the solvent is removed by evaporation under reduced pressure.
After recrystallization of the residue in a
<Desc / Clms Page number 4>
1: 1: 1 mixture: acetone, ether and petroleum ether are obtained
EMI4.1
holds hexahydro-verrucar1ne A which melts at 113-115.C. CoJ2 m + 2A * + 20 (o * 1 # 15 in chloroform). Infra- spectrum
EMI4.2
red (in CH2C12 and KDr) 1 band at 2.73 lU; 2, S2 lUI 3.41 lU. gvo / u; 5.76 / u; 5080 / u; 8.00 lUI 8.24 / u; bzz ui z8 lU) 8.70 u; 8.85 u 9.16 / u; 9.71 / u; 10.31 / u and 10.58 a. Of
EMI4.3
ultraviolet, no selective absorption is observed. The thermoelectric determination of the molecular weight gives 510 ¯ 10 (in the
EMI4.4
dichloroethane calculated value (508.6).
Claims (1)
Publications (1)
Publication Number | Publication Date |
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BE635251A true BE635251A (en) |
Family
ID=201863
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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BE635251D BE635251A (en) |
Country Status (1)
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- BE BE635251D patent/BE635251A/fr unknown
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