1State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, P. R. China
2Graduate School of Chinese Academy of Sciences, Beijing, P. R. China
Two new trijugin-type limonoids, cipatrijugins E and F (1 and 2), together with the known cipatrijugins A and D (3–4), were isolated from the stem bark of Cipadessa baccifera. All structures were elucidated by spectroscopic analysis. The in vitro cytotoxicity of compounds 1–4 was also tested. Compound 1 showed significant in vitro cytotoxicity against MCF-7, SW480, HL-60, and SMMC-7721 cells, with IC50 values of 5.0, 6.6, 4.5, and 21.6 µM, respectively.
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