Androstane-17-carboxylic acid esters process for their preparation and medecine containing them

Abstract From the Canadian patent

New androstane 17-carboxylic acid esters represented by general formula (I), wherein R2 represents a lower alkyl group containing 1 to 4 carbon atoms a, lower alkyl group from 2 to 4 carbon atoms substituted by an amino group or an aralkyl group from 6 to 12 carbon atoms R2 and R3, which may be the, same or different represent a hydrogen atom or a lower alkyl group containing 1 to 4 carbon atoms, R4 represents a hydrogen atom a hydroxy, group, or an acetoxy group, R5 represents a hydroxy group or an acetoxy group, or R4 and R5 represent together a divalent alkylenedioxy group R6, represents a hydroxy group, a methoxy group or an acetoxy group R7, represents a methyl group or a hydroxymethyl …