The molecule is a steroid acid that is ergosta-8,24(28)-dien-26-oic acid substituted by hydroxy groups at positions 3 and 12, a methyl group at position 4 and oxo groups at positions 7 and 11 (the 3alpha,4alpha,5alpha,12alpha stereoisomer). Isolated from Antrodia cinnamomea and Antrodia camphorata, it exhibits antineoplastic activity. It has a role as a metabolite and an antineoplastic agent. It is an 11-oxo steroid, a 7-oxo steroid, a steroid acid, a 3alpha-hydroxy steroid, a 12alpha-hydroxy steroid, a monocarboxylic acid and a secondary alpha-hydroxy ketone.
(6R)-6-[(3R,4S,5S,10S,12R,13R,14R,17R)-3,12-dihydroxy-4,10,13-trimethyl-7,11-dioxo-2,3,4,5,6,12,14,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-17-yl]-2-methyl-3-methylideneheptanoic acid