19-Nor-17a-pregna-4,9-dien-20-yn-3-one,17-hydroxy- (6CI,7CI,8CI); 17a-Ethynyl-17-hydroxyestra-4,9-dien-3-one; 17a-Ethynyl-3-oxo-4,9-estradien-17b-ol; 17a-Ethynylestra-4,9-dien-17-ol-3-one;RU 3097
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