26,27-Dinorcholest-5-en-3-ol, 24-(2-methylcyclopropyl)-, (3beta,24R(1R,2R))- 26,27-Dinorcholest-5-en-3-ol, 24-(2-methylcyclopropyl)-, (3beta,24R(1S,2R))- 67314-15-2 Petrosterol