Nomegestrol

Nomegestrol

Clinical data
ATC code	G03DB04 (WHO)
Identifiers
IUPAC name (17α)-17-acetyl-17-hydroxy-6-methylestra-4,6-dien-3-one
CAS Number	58691-88-6
PubChem CID	68783
ChemSpider	62024
KEGG	D07222
Chemical and physical data
Formula	C21H28O3
Molar mass	328.445 g/mol
3D model (Jmol)	Interactive image
SMILES O=C4\C=C3\C(=C/[C@@H]1[C@H](CC[C@@]2([C@@](O)(C(=O)C)CC[C@@H]12)C)[C@H]3CC4)C
InChI InChI=1S/C21H28O3/c1-12-10-18-16(15-5-4-14(23)11-17(12)15)6-8-20(3)19(18)7-9-21(20,24)13(2)22/h10-11,15-16,18-19,24H,4-9H2,1-3H3/t15-,16-,18-,19+,20+,21+/m1/s1 Key:KZUIYQJTUIACIG-YBZCJVABSA-N

Nomegestrol (INN), also known as 19-normegestrol, is a steroidal progestin which was patented in 1975 but was never marketed. It is the parent compound of nomegestrol acetate, which is marketed as a progestin.