(1S,2R,5E,10R,11S,14R,15S)-15-ethyl-14-ethynyl-5-(hydroxyimino)tetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadec-6-en-14-yl acetate
(1S,2R,5E,10R,11S,14R,15S)-15-ethyl-14-ethynyl-5-(hydroxyimino)tetracyclo[8.7.0.02,7.011,15]heptadec-6-en-14-yl acetate
(1R,3aS,3bR,7E,9aR,9bS,11aS)-11a-ethyl-1-ethynyl-7-(hydroxyimino)-1H,2H,3H,3aH,3bH,4H,5H,7H,8H,9H,9aH,9bH,10H,11H,11aH-cyclopenta[a]phenanthren-1-yl acetate