Lisinopril Related Compound A (15 mg) ((S)-2-{(3S,8aS)-3-(4-aminobutyl)-1,4-dioxohexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl}-4-phenylbutanoic acid);(S)-1-[N2-(1-carboxy-3-phenylpropyl)-lysyl-proline dihydrate;LIQUID PRED (prednisone),Lisinopril;Lisinopril API;Lisinopril (Zestril);Lisinopril for system suitability A;Lisinopril for peak identification;N2-[(1S)-1-carboxy-3-phenylpropyl]-L-lysyl-L-proline,hydrate (1:2)