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Abstract
Two new triterpenes, 3β, 7β-dihydroxyolean-12-en-11-one (1) and 3β-O-acetyl-7β-hydroxyolean-12-en-11-one (2), along with four known triterpenes 3β-hydroxyolean-12-en-11-one (3), β-amyrin (4), lup-20(29)-ene-1β, 3β-diol (5) and 1β, 3β-dihydroxy-urs-9(11)-12-diene (6), were isolated from the stems and leaves of Maytenus guangxiensis C. Y. Cheng et W. L. Sha. Their structures were elucidated using 1D and 2D NMR spectroscopy as well as MS and IR experiments. Compounds (3-6) were isolated from M. guangxiensis for the first time. Compounds 1–6 were evaluated for their antiproliferative activities against Eca-109, PANC-1, EJ and HeLa cell lines. The results showed that compounds 1–6 displayed a certain degree of inhibitory effects against the proliferation of various human cancer cell lines.
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