Abstract
A new type of Annonaceous acetogenin was isolated from the roots of Goniothalamus donnaiensis. The structures of two epimeric pairs, donnaienin A (1) and 34-epi-donnaienin A (1'), and donnaienin B (2) and 34-epi-donnaienin B (2'), characterized by the presence of a γ-(hydroxymethyl) γ-lactone moiety, were elucidated by spectroscopic analysis and chemical derivatization. Four known mono-THF acetogenins-murisolin, isoannonacin, and a mixture of annonacin and goniothalamicin-were also isolated.
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