(1S,2S,7S,10R,11S,14S,15S)-14-hydroxy-4-(hydroxymethylidene)-2,14,15-trimethyltetracyclo[8.7.0.02,7.011,15]heptadecan-5-one
(1S,2S,4E,7S,10R,11S,14S,15S)-14-hydroxy-4-(hydroxymethylidene)-2,14,15-trimethyltetracyclo[8.7.0.02,7.011,15]heptadecan-5-one
(1S,3aS,3bR,5aS,9aS,9bS,11aS)-1-hydroxy-8-(hydroxymethylidene)-1,9a,11a-trimethyl-dodecahydrocyclopenta[a]phenanthren-7-one