| abstract |
(57) [Summary] [Structure] General Formula II [Wherein R is an alkyl group having 1 to 3 carbon atoms, (R '; represents an acyl group having up to 10 carbon atoms)] 3-alkoxy-18-methyl-3,5 -Estradien-17-one. [Effect] This compound is a starting material for a new production method of 17α-ethynyl-17β-hydroxy-18-methyl-4,15-estradien-3-one [gestedene], which is a highly acting gestagen. |