Mecigestone

Mecigestone
Clinical data
Other names	Pentarane B; 6α-Methyl-16α,17α-cyclohexanoprogesterone
Identifiers
	IUPAC name (4aR,4bS,6aS,6bS,10aR,11aS,11bR,13S)-6b-Acetyl-4a,6a,13-trimethyl-4,4b,5,6,7,8,9,10,10a,11,11a,11b,12,13-tetradecahydro-3H-indeno[2,1-a]phenanthren-2-one;
CAS Number	58212-84-3;
PubChem CID	124372;
ChemSpider	110790;
UNII	N3UWJ2K7NF;
CompTox Dashboard (EPA)	DTXSID30973778 ;
Chemical and physical data
Formula	C26H38O2
Molar mass	382.588 g·mol−1
3D model (JSmol)	Interactive image;
	SMILES C[C@H]1C[C@@H]2[C@H](CC[C@]3([C@H]2C[C@@H]4[C@]3(CCCC4)C(=O)C)C)[C@@]5(C1=CC(=O)CC5)C;
	InChI InChI=1S/C26H38O2/c1-16-13-20-21(24(3)11-8-19(28)15-22(16)24)9-12-25(4)23(20)14-18-7-5-6-10-26(18,25)17(2)27/h15-16,18,20-21,23H,5-14H2,1-4H3/t16-,18+,20+,21-,23-,24+,25-,26-/m0/s1; Key:OAICPORQJIVREU-SGCXAXHESA-N;

Mecigestone, also known as pentarane B, as well as 6α-methyl-16α,17α-cyclohexanoprogesterone, 6α-methylcyclohexano[1',2';16,17]pregn-4-ene-3,20-dione, or 17α-acetyl-6α-methyl-16β,24-cyclo-21-norchol-4-en-3-one, is a steroidal progestin that was developed by the Zelinskii Institute of Organic Chemistry of the Russian Academy of Sciences and has been proposed for clinical use as a progestogen but has not been marketed. It is the 6α-methylated analogue of pentarane A, which is also known as D'6-pentarane or pregna-D'6-pentarane.