title: [Triterpenes isolated from Poria cocos by derivazations].
abstract: The separation of triterpene acids was achieved from Poria cocos (Schw.) Wolf by TLC after treatment with Ph2CNN or RX under mild condition followed by selective hydrolysis of ester groupings. Three triterpene acids, 3 beta-acetoxyl-16 alpha-hydroxy-lanosta-8,24(31)-diene-21-oic acid (I), 3-oxo-16 alpha-hydroxy-lanosta-7,9(11), 24(31)-trien-21-oic acid (II) and 3 beta, 16 alpha-dihydroxylanosta-7,9(11), 24(31)-trien-21-oic acid (III) were isolated.
authors.affiliation: Institute of Medicinal Biotechnology, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100050.
authors.forename: Zhaojin
authors.initials: Z
authors.lastname: Zhong
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
mesh_terms: D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D004952:Esters; D015394:Molecular Structure; D010598:Pharmacognosy; D010946:Plants, Medicinal / Q000737:chemistry*; D011124:Polyporaceae / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D013678:Technology, Pharmaceutical / Q000379:methods; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D004365:Drugs, Chinese Herbal; D004952:Esters; D014315:Triterpenes