19-Nor-17a-pregna-5(10),20-dien-3-one,17-hydroxy- (6CI,7CI,8CI); 17a-Vinyl-5(10)-estrene-17b-ol-3-one; 17a-Vinylestr-5(10)-en-17b-ol-3-one; NSC 72160; Norgesterone; Norvinodrel; Vinylestrenolone
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