10,17-.alpha.-Dihydroxy-19-norpregn-4-en-20-yn-3-one 10-.beta.-hydroxy-19-norethisterone 10-.beta.-hydroxynorethisterone 10.beta.Hydroxynorethisterone 1236-00-6 17-.alpha.-ethynyl-10-.beta.-17-.beta.-dihydroxy-4-estren-3-one 17-Ethynyl-10-hydroxy-19-nortestosterone 19-Nor-17.alpha.-pregn-4-en-20-yn-3-one, 10,17-dihydroxy- 19-Norpregn-4-en-20-yn-3-one, 10,17-dihydroxy-, (17.alpha.)- 19-Nortestosterone, 17-ethynyl-10-hydroxy- Estr-4-en-3-one, 17.alpha.-ethynyl-10,17-dihydroxy NSC63012