(1S,2S,7S,10R,11S,14S,15S)-14-acetyl-2,15-dimethyltetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadecan-5-one
(1S,2S,7S,10R,11S,14S,15S)-14-acetyl-2,15-dimethyltetracyclo[8.7.0.02,7.011,15]heptadecan-5-one
(1S,3aS,3bR,5aS,9aS,9bS,11aS)-1-acetyl-9a,11a-dimethyl-hexadecahydro-1H-cyclopenta[a]phenanthren-7-one