Cytotoxic lanostane-type triterpenes from the fruiting bodies of .

A new lanostane-type triterpene, namely 3-oxo-5α-lanosta-7,9(11)-dien-24-oic acid methyl ester (), and three known compounds including ganoderal A (), ganoderiol B () and ganodermenonol () were isolated from the fruiting bodies of by silica gel column chromatography and Sephadex LH-20 column chromatography. Their structures were determined by extensive NMR data and mass spectral analysis. The cytotoxic activity of the isolated compounds against SK-Hep-1, HepG2, Hela and Hela/VCR cancer cell lines was assessed by using MTT assay.