17-Ethynyl-18-methylestra-5(10),9(11)-dien-17-ol-3-one

17-Ethinyl-17-hy-droxy-18-methylestra-5(10),9(11)-dien-3-one

13-Ethyl-17-hydroxy-18,19-dinorpregna-5(10),9(11)-dien-20-ynone