Abstract
Abstractmagnified imageTwo 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 16α‐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.
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