10,17-alpha-Dihydroxy-19-norpregn-4-en-20-yn-3-one (9CI) 10-beta-hydroxy-19-norethisterone 10-beta-hydroxynorethisterone 10B-HYDROXY-19-NORETHINDRONE 10beta-Hydroxy-19-norethisterone 10betaHydroxynorethisterone 1236-00-6 17-Ethynyl-10-hydroxy-19-nortestosterone 17-alpha-ethynyl-10-beta-17-beta-dihydroxy-4-estren-3-one 17alpha-Ethinyl-10beta,17beta-dihydroxy-4-estren-3-one 19-Nor-17alpha-pregn-4-en-20-yn-3-one, 10,17-dihydroxy- 19-Norpregn-4-en-20-yn-3-one, 10,17-dihydroxy-, (17alpha)- 19-Nortestosterone, 17-ethynyl-10-hydroxy- Estr-4-en-3-one, 17alpha-ethynyl-10,17-dihydroxy NSC 63012