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(17a)-4-Methyl-19-norpregna-1,3,5(10)-trien-20-yne-3,17-diol (9CI); 4-Methyl Ethynyl Estradiol; 4-Methyl-19-nor-17a-pregna-1,3,5(10)-trien-20-yne-3,17-diol (4-Methyl-ethinylestradiol); Ethinylestradiol Imp K. (EP) CAS 155683-61-7 PubChem CID 71587537
C#C[C@]1(O)CC[C@H]2[C@@H]3CCc4c(ccc(O)c4C)[C@H]3CC[C@@]21C -
C#C[C@]1(O)CC[C@@H]2[C@@H]3CCc4c(ccc(O)c4C)[C@H]3CC[C@@]21C -
C#C[C@@]1(O)CC[C@@H]2[C@@H]3CCc4c(ccc(O)c4C)[C@@H]3CC[C@@]21C