17-Hydroxy-19-nor-17-nor-17-alpha-pregn-4-en-20-yn-3-one hexanoate (ester) O-acetyloxime 19-Nor-17-alpha-pregn-4-en-20-yn-3-one, 17-hydroxy-, hexanoate (ester), O-acetyloxime 24067-53-6 BRN 2609310