17-Hydroxy-19-nor-17-alpha-pregn-4-en-20-yn-3-one acetate (ester) O-propionyloxime 19-Nor-17-alpha-pregn-4-en-20-yn-3-one, 17-hydroxy-, acetate (ester), O-propionyloxime 22234-05-5 BRN 2608435