A new oxygenated lanostane-type triterpene, named lucidumol C, together with six known compounds, was isolated from the chloroform extract of the fruiting bodies of Ganoderma lingzhi. Structures were established based on extensive spectroscopic and chemical studies. Potential cytotoxic activities of the isolated compounds were evaluated against human colorectal carcinoma (HCT-116, Caco-2), human liver carcinoma (HepG2), and human cervical carcinoma (HeLa) cell lines using WST-1 reagent. Selectivity was evaluated using normal human fibroblast cells (TIG-1 and HF19). Among the compounds, lucidumol C showed potent selective cytotoxicity against HCT-116 cells with an IC50 value of 7.86 ± 4.56 µM and selectivity index (SI) >10 with remarkable cytotoxic activities against Caco-2, HepG2 and HeLa cell lines.
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