(3S,5S,10S,13R,14R,17R)-10,13-dimethyl-17-[(2R)-6-methylhept-5-en-2-yl]-2,3,4,5,6,7,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-ol (3S,5S,10S,13R,14R,17R)-17-[(1R)-1,5-dimethylhex-4-enyl]-10,13-dimethyl-2,3,4,5,6,7,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-ol 128-33-6 5alpha-Cholesta-8,24-dien-3beta-ol C05437 Zymosterol delta8,24-Cholestadien-3beta-ol LMST01010066 EINECS 204-880-9 5-alpha-Cholesta-8,24-dien-3-beta-ol CHEBI:18252 zymostrol