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Three new tirucallane triterpenoids, brumollisols A–C (1–3, resp.), together with five known analogues, (23R,24S)‐23,24,25‐trihydroxytirucall‐7‐ene‐3,6‐dione (4), piscidinol A (5), 24‐epipiscidinol A (6), 21α‐methylmelianodiol (7), and 21β‐methylmelianodiol (8), were isolated from an EtOH extract of the stems of Brucea mollis. Their structures were elucidated by means of spectroscopic methods including...
Six new cardenolides, periforosides D–E (1–2), periforgenin C (3) and periforosides F–H (4–6), as well as 10 previously identified cardenolides (7–16) were isolated from the ethanol extract of the stems of Periploca forrestii. The structures of the new compounds were determined using extensive spectroscopic analyses including HRESI-MS, 1D and 2D NMR data. Evaluation of the cytotoxic activity of all...
Two oleanane-type triterpene saponins, named albizosides D and E (1 and 2), together with a known compound, Julibroside J 8 (3), were isolated from the stem bark of Albizia chinensis. The structures of compounds 1 and 2 were established by 1D, 2D NMR experiments, and chemical methods, and they showed moderate cytotoxic activity against a small panel of human tumor cell lines.
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