<unk> , also known as 17α,21-dimethyl-δ9-19-norprogesterone or as 17α,21-dimethyl-19-norpregna-4,9-diene-3,20-dione, is a synthetic norpregnane steroid and a derivative of progesterone. It is specifically a combined derivative of 17α-methylprogesterone and 19-norprogesterone, or of 17α-methyl-19-norprogesterone. Related derivatives of 17α-methyl-19-norprogesterone include demegestone and trimegestone.
Promegestone
Algestone
Algestone acetonide
Metapristone
Nomegestrol acetate
Telapristone
Gestodene
Ethinylestradiol sulfonate