(1R,3aS,3bR,5aR,7S,9aS,9bS,11aR)-3a-hydroxy-9a,11a-dimethyl-1-(5-oxo-2,5-dihydrofuran-3-yl)-hexadecahydro-1H-cyclopenta[a]phenanthren-7-yl 2-bromoacetate

(1R,3aS,3bR,5aR,7S,9aS,9bS,11aR)-3a-hydroxy-9a,11a-dimethyl-1-(5-oxo-2,5-dihydrofuran-3-yl)-hexadecahydro-1H-cyclopenta[a]phenanthren-7-yl 2-bromoacetate