13β-ethyl-17αethynyl-3-methoxygona-2,5(10)-dien-17β-ol, 13-ethyl-17-ethynyl-3-methoxy-4,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthren-17-ol, (8R,9S,13S,14S,17R)-13-Ethyl-17-ethynyl-3-methoxy-4,6,7,8,9,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-ol, 13β-ethyl-17α-ethynyl-3-methoxygona-2,5(10)-dien-17β-ol, dl-13-ethyl-17α-ethynyl-3-methoxygona-2,5(10)-dien-17-ol,