(16?,17?)-19-Norpregna-1,3,5(10)-trien-20-yne-3,16,17-triol; 19-Nor-17?-pregna-1,3,5(10)-trien-20-yne-3,16?,17-triol; 17?-Ethynylestriol;17-Ethynylestriol
(16?,17?)-19-Norpregna-1,3,5(10)-trien-20-yne-3,16,17-triol; 19-Nor-17?-pregna-1,3,5(10)-trien-20-yne-3,16?,17-triol; 17?-Ethynylestriol;17-Ethynylestriol