(S)-2-((S)-2-(((S)-4-cyclohexyl-1-ethoxy-1-oxobutan-2-yl)amino)propanoyl)-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid; Quinapril Impurity E
(S)-2-((S)-2-(((S)-4-cyclohexyl-1-ethoxy-1-oxobutan-2-yl)amino)propanoyl)-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid; Quinapril Impurity E