19-Nor-17a-pregn-4-en-20-yne-3b,17-diol (6CI,7CI,8CI); 17a-Ethynyl-4-estrene-3b,17b-diol; 17a-Ethynyl-4-oestrene-3b,17b-diol; 3b-Hydroxylynestrenol; Ethinodiol;Ethynodiol; Etynodiol
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