Assertion: alkaloid | /r/HasProperty | a mixture of alkaloids
Facets:
Source sentences:
text: A process for the preparation of alkaloids of the formulae C1QH13N5, C22H35ON, and C21H33ON comprising treating at least one member of the group consisting of crushed leaves and inflorescences of plants from the species H. africana and H. floribunda of the genus Holarrhena (Apocynaceae) with an acidified alkanol, filtering to remove chlorophyll, rubbers, triterpens and substances of decomposition of tannoids and to obtain a filtrate containing said alkaloids, treating the filtrate with an alkali, treating the resulting material with benzene to obtain the alkaloid (C H N by crystallization, fixing by chromatography the alkaloids soluble in the benzene solvent, eluting said alkaloids respectively with a benzene-ether mixture, chloroform and methanol, to release C H ON alkaloid, a mixture of alkaloids, and c n on alkaloid, separating said mixture of alkaloids from each other by fixing on a chromatographic column, and eluting with ether.