11-beta-Ethyl-17-alpha-ethinylestradiol 11-beta-Ethyl-19-nor-17-alpha-pregna-1,3,5(10)-trien-20-yne-3,17-diol 19-Nor-17-alpha-pregna-1,3,5(10)-trien-20-yne-3,17-diol, 11-beta-ethyl- 39845-47-1