TRITERPENES OF PORIA-COCOS
TRITERPENES OF PORIA-COCOS
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DOI:
10.1016/s0031-9422(00)95099-4
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发表时间:
1993-03-01
期刊:
影响因子:
3.8
通讯作者:
SHINGU, T
中科院分区:
文献类型:
--
作者:
TAI, T;AKAHORI, A;SHINGU, T
Four lanostane triterpenes and four novel 3,4-seco-lanostane triterpenes were isolated from the surface layer of Poria cocos. 3beta-Hydroxylanosta-7,9(11),24-trien-21-oic acid, trametenolic acid, dehydroeburicoic acid and eburicoic acid were isolated by HPLC after treatment with N-chloromethylphthalimide. Four novel 3,4-seco-lanostanes: poricoic acid C, D, DM and AM were isolated by HPLC methods. Their structures are, respectively, 3,4-seco-lanosta-4(28),7,9(11),24(31)-tetraen-3,21-dioic acid and 16alpha,25-dihydroxy-3,4-seco-lanosta-4(28),7,9(11),24(31)-tetraen-3,21-dioic acid, 16alpha,25-dihydroxy-3,4-seco-lanosta-4(28),7,9(11),24(31)-tetraen-3,21-dioic acid 3-methyl ester and 16alpha-hydroxy-3,4-seco-lanosta-4(28),7,9(11),24(31)-tetraen-3,21-dioic acid 3-methyl ester, from spectroscopic evidence.