摘要:
Novel conjugates and immunogens derived from vincristine and antibodies generated by these immunogens are useful in immunoassays for the quantification and monitoring of vincristine in biological fluids.
摘要:
Salts of a pharmacologically active, naturally occurring or synthetic alkaloids, or alkaloid derivatives and a phosphatidic acid are provided, which preferably have the formula[Alk].sub.x [PA].sub.ywhereinAlk represents a cation derived from said pharmacologically active, naturally occurring or synthetic alkaloid, or alkaloid derivative,PA represents a phosphatidic acid or a mixture of different phosphatidic acids, andx:y is from 2:1 to 1:2.The therapeutic use of the salts of the invention in the treatment of syndromes affecting the elderly, particularly conditions that are related to changes in cerebral metabolism and reduced blood flow are decribed, as well as cosmetic methods.
摘要翻译:提供药理活性的天然存在或合成的生物碱或生物碱衍生物和磷脂酸的盐,其优选具有式[Alk] x [PA] y,其中Alk表示衍生自所述药理学活性的天然存在或合成的阳离子 生物碱或生物碱衍生物,PA代表磷脂酸或不同磷脂酸的混合物,x:y为2:1至1:2。 本发明的盐在治疗影响老年人的综合征中的治疗用途,特别是与脑代谢变化和血流量减少有关的病症,以及美容方法。
摘要:
A method of preparing an organ culture from branched tissue of a Catharanthus roseus seedling is disclosed. The indole alkaloids vincristine and vinblastine can be recovered from the organ culture tissue via extraction.
摘要:
Alkaloids present in Catharanthus roseus tissue are selectively concentrated by aqueous extraction of ground tissue followed by extraction with organic solvent e.g. ethyl acetate. The resultant concentrate is rich in catharanthine, vindoline and 3',4'-anhydrovinblastine (AVLB). Yield of AVLB is enhanced by addition to the aqueous extraction medium of acid, salt, or hydrogen peroxide and can be further enhanced through the addition of sodium borohydride.
摘要:
The invention relates to novel furfuryl derivatives of the general formula (I), ##STR1## wherein R.sub.1 stands for a hydrogen atom or an acetyl group,R.sub.2 stands for a hydroxyl or ethyl group of.beta.-position;R.sub.3 means an ethyl group of .alpha.-position;R.sub.4 represents a hydrogen atom; orR.sub.3 and R.sub.4 together represent an oxygen bridge; andB stands for a hydroxyl of an O-acyl group, as well as their acid addition salts and pharmaceutical preparations containing these compounds. Further on, the invention relates to a process for preparing these compounds and preparations.The compounds of the general formula (I) show a cytostatic activity with less toxicity than that of the commerically available known vinblastine-type bis-indole alkaloid drugs.
摘要:
The invention relates to new cytostatic compound, process for their preparation and pharmaceutical compositions containing them. More particularly, there are provided new compounds of the general formula ##STR1## in which R.sup.4 is .beta.-hydroxyl andR.sup.3 is .alpha.-ethyl; orR.sup.4 is hydrogen andR.sup.3 is .beta.-ethyl;R" is a straight chained alkyl having from 1 to 10 carbon atoms, or a branched chained alkyl having from 3 to 10 carbon atoms, in which groups the carbon atom attached to the >N.sub.a -CH.sub.2 -O-- group has a primary or secondary configuration or an alkenyl or alkinyl having from 3 to 6 carbon atoms, or an aralkyl having from 1 to 3 carbon atoms in the alkyl moiety;R.sup.1 is methoxy andR.sup.2 is acetyl,provided that if R.sup.3 is .alpha.-ethyl and R.sup.4 .beta.-hydroxyl, R.sup.4 is other than ethyl.These compounds and N-desmethyl-N- ethoxy- methyl -vinblastine can be prepared according to the invention by transetherification of compounds of the compounds of the general formula ##STR2## with a large excess of alcohols of the general formulaR"--OH (III)Pharmaceutical compositions containing compounds of the general formula /I/ as active ingredients are also within the scope of invention.
摘要:
A mixture of minor diindole alkaloids from Vinca-containing vinblastine and 4-deacetoxy-vinblastine vines, are separated by subjecting the mixture to a deacetylation to correct the vinblastine to deacetyl-vinblastine prior to chromatographic separation of said mixture in a single stage.