6-Ketonorethindrone

6-Oxo Norethindrone

17α-Hydroxy-19-norpregn-4-en-20-yne-3,6-dione

17BETA-HYDROXY-19-NORPREGN-4-EN-20-YNE-3,6-DIONE

(17α)-17-Hydroxy-19-norpregn-4-en-20-yne-3,6-dione