Butagest

Butagest
Clinical data
Other names	Buterol; 17α-Acetoxy-3β-butanoyloxy-6-methyl-pregna-4,6-dien-20-one; 17α-Acetoxy-6-methyl-20-oxopregna-4,6-dien-3β-yl butyrate; 6-Methyl-17α-hydroxy-δ6-progesterone 3β-butanoate 17α-acetate
Drug class	Progestogen; Progestogen ester
Identifiers
	IUPAC name [(3S,8R,9S,10R,13S,14S,17R)-17-Acetyl-17-acetyloxy-6,10,13-trimethyl-1,2,3,8,9,11,12,14,15,16-decahydrocyclopenta[a]phenanthren-3-yl] butanoate;
CAS Number	205993-31-3 ;
PubChem CID	15816431;
ChemSpider	21377535;
CompTox Dashboard (EPA)	DTXSID201336951 ;
Chemical and physical data
Formula	C28H40O5
Molar mass	456.623 g·mol−1
3D model (JSmol)	Interactive image;
	SMILES CCCC(=O)O[C@H]1CC[C@@]2([C@H]3CC[C@]4([C@H]([C@@H]3C=C(C2=C1)C)CC[C@@]4(C(=O)C)OC(=O)C)C)C;
	InChI InChI=1S/C28H40O5/c1-7-8-25(31)32-20-9-12-26(5)22-10-13-27(6)23(21(22)15-17(2)24(26)16-20)11-14-28(27,18(3)29)33-19(4)30/h15-16,20-23H,7-14H2,1-6H3/t20-,21+,22-,23-,26+,27-,28-/m0/s1; Key:VWKIFEBMJRFARL-NAEKRLSBSA-N;

Butagest, also known as buterol is a modification of megestrol acetate in which the C-3 ketone has been replaced by a C3β butanoyloxy moeity. It is chemically known as 3β-hydroxy-6-methyl-17α-hydroxypregna-4,6-dien-20-one 3β-butanoate 17α-acetate or 6-methyl-17α-hydroxy-δ⁶-progesterone 3β-butanoate 17α-acetate and is a steroidal progestin which was developed in Russia for potential clinical use as a progesterone supplement primarily for Hormone replacement therapy but it was never marketed for reasons which are still unclear.