Benazepril Tert-Butyl Ester 

Ethyl (S)-2-(((S)-1-(2-(tert-butoxy)-2-oxoethyl)-2-oxo-2,3,4,5-tetrahydro-1H-benzo[b]azepin-3-yl)
amino)-4-phenylbutanoate; 1H-1-Benzazepine-1-acetic acid, 3-[[(1S)-1-(ethoxycarbonyl)-3-phenylpropyl]amino]-2,3,4,5-tetrahydro-2-oxo-, 1,1-dimethylethyl ester, (3S); 1H-1-Benzazepine-1-acetic acid, 3-[[1-(ethoxycarbonyl)-3-phenylpropyl]amino]-2,3,4,5-tetrahydro-2-oxo-, 1,1-dimethylethyl ester, [S-(R*,R*)]; 1,1-Dimethylethyl (3S)-3-[[(1S)-1-(ethoxycarbonyl)-3-phenylpropyl]amino]-2,3,4,5-tetrahydro-2-oxo-1H-1-benzazepine-1-acetate;