19-Nor-17a-pregna-1,3,5(10)-trien-20-yn-17-ol,3-methoxy-, acetate (6CI,7CI,8CI); 19-Norpregna-1,3,5(10)-trien-20-yn-17-ol,3-methoxy-, acetate, (17a)- (9CI); Mestranol acetate
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