Synonyms: A-Norcholesta-5,24-diene-2-carboxylicacid, 2-hydroxy-3-oxo-, methyl ester, (2b)-; Dicyclopenta[a,f]naphthalene-2-carboxylic acid,6-[(1R)-1,5-dimethyl-4-hexenyl]-1,2,3,3a,3b,4,5,5a,6,7,8,8a,8b,9-tetradecahydro-2-hydroxy-3a,5a-dimethyl-1-oxo-,methyl ester, (2S,3aR,3bS,5aR,6R,8aS,8bS)- (9CI); Anthosterone A;Dicyclopenta[a,f]naphthalene-2-carboxylic acid,6-(1,5-dimethyl-4-hexenyl)-1,2,3,3a,3b,4,5,5a,6,7,8,8a,8b,9-tetradecahydro-2-hydroxy-3a,5a-dimethyl-1-oxo-,methyl ester, [2S-[2a,3aa,3bb,5aa,6a(S*),8ab,8ba]]-