19-Nor-17a-pregn-4-en-20-yn-3-one,17-hydroxy-, O-hexanoyloxime, acetate (ester) (8CI); Hexanoic acid,O-[(17-hydroxy-19-nor-17a-pregn-4-en-20-yn-3-ylidene)amino] deriv. (8CI); Hexanoic acid,O-[(17-hydroxy-19-nor-17a-pregn-4-en-20-yn-3-ylidene)amino] deriv. acetate (ester) (8CI)
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