Trandolapril EP Impurity E

: Trandolapril USP Related Compound E; Trandolapril Diacid; Trandolaprilate (EP); (2S,3aR,7aS)-1-[(2S)-2-[[(1S)-1-carboxy-3-phenylpropyl]amino]propanoyl]octahydro-1H-indole-2-carboxylic acid (as per EP);