The molecule is a 3-oxo steroid, the structure of which is that of zymosterol, carboxy-substituted at C-4, and in which the 3-hydroxy function has been oxidised to an oxo group. It derives from a zymosterol. It is a conjugate acid of a 3-dehydro-4-carboxyzymosterol(1-).
(5S,10S,13R,14R,17R)-10,13-dimethyl-17-[(2R)-6-methylhept-5-en-2-yl]-3-oxo-1,2,4,5,6,7,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthrene-4-carboxylic acid