1H-1-Benzazepine-1-acetic acid, 3-[[(1R)-1-(ethoxycarbonyl)-3-phenylpropyl]amino]-2,3,4,5-tetrahydro-2-oxo-, monohydrochloride, (3R)- (3R)-3-[[(1R)-1-(Ethoxycarbonyl)-3-phenylpropyl]amino]-2,3,4,5-tetrahydro-2-oxo-1H-1-benzazepine-1-acetic acid hydrochloride 3-[[1-ethoxycarbonyl- 3-phenyl-(1R)- propyl]amino]2,3,- 4,5-tetra-hydro- 2-oxo-1H-1(3R)- benzazepine- 1-acetic acid Benazepril hydrochloride impurity A Benazepril hydrochloride impurities Benazepril EP Impurity A Benazepril Impurity 1(Benazepril EP Impurity A) 1H-1-Benzazepine-1-aceticacid,3-[[(1R)-1-(ethoxycarbonyl)-3-phenylpropyl]amino]-2,3,4,5-tetrahydro-2-oxo-,hydrochloride(1:1),(3R)-