Abstract:Two strains of fungal mycelia, SC0351 and SC0652, were obtained from tissue culture of the fruiting bodies of two Polyporus from Basidiomycetes collected at Dinghushan, Guangdong Province, China. From the solid cultures of these fungi, four lanostane-type triterpenes were isolated by using column chromatography. They were identified by spectral analysis as polyporenic acid C （1）, pachymic acid （2）, eburicoic acid （3） and sulphurenic acid （4）. Compound 2 was obtained from Polyporus for the first time.