A new triterpenoid, 3,4-secolanosta-4(28),7,9,24Z-tetraen-3,26-dioic acid, along with two known compounds 16-deoxyporicoic acid B and 3-epidehydrotrametenolic acid were isolated from the dried sclerotia of Poria cocos Wolf (Polyporaceae). The structures are elucidated by spectroscopic methods and literatures.
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