The title compound, C22H29F3O5S [systematic name:

(3S,8R,9S,10R,13S,14S)-10,13-dimethyl-17-(trifluoromethyl-sulfonyloxy)-2,3,4,7,8,9,10,11,12,13,14,15-dodecahydro-1H-cyclopenta[a]phenanthren-3-yl acetate], contains a fused four-ring steroidal system. Rings A and C adopt a chair conformation, while rings B and D adopt half-chair and envelope (with the fused CH atom as the flap) conformations, respectively. In the crystal, weak intermolecular C—H O interactions link the molecules into layers parallel to the ab plane