Lisinopril Impurity 11

N2-(1-Ethoxy-1,4-dioxo-4-phenylbutan-2-yl)-N6-(2,2,2-trifluoroacetyl)-L-lysine;N2-(1-Ethoxycarbonyl-3-oxo-3-phenylpropyl)-N6-trifluoroacetyl-L-lysine;