作者: Munehisa Arisawa , John M. Pezzuto , Geoffrey A. Cordell , Norman R. Farnsworth , A. Douglas Kinghorn
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摘要: Isocucurbitacin B (I), 3-epi-isocucurbitacin (II), and cucurbitacin (III) were identified as the principal cytotoxic constituents of Ipomopsis aggregata (Pursh) V. Grant (Polemoniaceae). The structure new compound, II, was determined through analysis its spectrometric characteristics.