Abstract
Sarcorusones A–D (1–4), four new androstane (C19-steroid) derivatives were characterized from Sarcococca ruscifolia along with five known compounds. Their structures were elucidated on the basis of extensive MS and NMR spectroscopic analysis. All the new structures share common 14-hydroxyl and 17-ketone functional groups, and compounds 2–4 feature a seneciamide group connecting to C-3 position. The inhibitory activities of all the isolates against melanoma cell B16F10 and lung cancer cell H1299 were evaluated, and compounds 2, 3, 5, and 6 exhibited moderate cytotoxic activities against B16F10 and H1299 cell lines with IC50 values 2.7–8.0 μM.
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