Quinapril benzyl ester maleate

quinapril benzyl ester ; 2-[2-{[1-(ethoxycarbonyl)-3-phenyl-propyl]amino}-1-oxopropyl]isoquinoline ; (3s)-2-[2-[[1-(ethoxycarbonyl)-3-phenylpropyl]amino]-1-oxopropyl]-1,2,3,4-tetrahydro-3-isoquinolinecarboxylic acid phenylmethyl ester (z)-2-butenedioate (1:1) ; (3s)-2-[(2s)-2-[[(1s)-1-(ethoxycarbonyl)-3-phenylpropyl]amino]-1-oxopropyl]-1,2,3,4-tetrahydro isoquinoline carboxylic acid benzy ester maleate ; quinapril benzyl ester maleate ; quinapril benzyl ester maleate (s)-benzyl2-((s)-2-(((s)-1-ethoxy-1-oxo-4-phenylbutan- 2-yl)amino)propanoyl)-1,2,3,4-tetrahydroisoquinoline-3- carboxylate but-2-enedioate