4,5-Secocholest-3-en-5-one

(3R,3aR,5aS,6S,9aR,9bS)-6-But-3-ynyl-3-(1,5-dimethyl-hexyl)-3a,6-dimethyl-2,3,3a,4,5,5a,6,7,9a,9b-decahydro-1H-cyclopenta[a]naphthalene

(3R,3aR,5aS,6S,9aR,9bS)-6-But-3-ynyl-3-(1,5-dimethyl-hexyl)-3a,6-dimethyl-2,3,3a,4,5,5a,6,9,9a,9b-decahydro-1H-cyclopenta[a]naphthalene