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Two New Triterpenes from the Surface Layer of Poria cocos
Author(s) -
Yang ChunHua,
Zhang ShiFang,
Liu WenYing,
Zhang ZunJian,
Liu JingHan
Publication year - 2009
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.200800360
Subject(s) - chemistry , terpene , stereochemistry , mushroom , food science
Two new triterpenes, poricoic acid AE ( 1 ) and poricoic acid CE ( 2 ), were isolated from the surface layer of the mushroom Poria cocos ( Schw .) Wolf , together with four known triterpenes, 3‐ O ‐acetyldehydroeburicoic acid, 3‐oxolanosta‐7,9(11),24(31)‐trien‐21‐oic acid, dehydrotrametenolic acid, and poricoic acid A. The structures of the two new triterpenes were elucidated as 16 α ‐hydroxy‐3,4‐seco‐lanosta‐4(28),7,9(11),24(31)‐tetraene‐3,21‐dioic acid‐3‐ethyl ester ( 1 ) and 3,4‐secolanosta‐4(28),7,9(11),24(31)‐tetraene‐3,21‐dioic acid‐3‐ethyl ester ( 2 ) mainly on the basis of HR‐ESI‐MS, EI‐MS, and 2D‐NMR analyses.