| 17-hydroxy-, (5-alpha,17-alpha)-19-norpregn-20-yn-3-on |
| 17-alpha)-17-hydroxy-19-norpregn-20-yn-3-one (5-alph |
| 17-alpha-pregn-20-yn-3-one, 17-hydroxy-19-nor-5-alph |
| 5 alpha-dihydronorethindrone |
| 5-alpha-dihydro-19-norethisterone |
| 5-alpha-dihydronorethindrone |
| 5-alpha-dihydronorethisterone |
| sts 737 |
