Using CC(=O)O, COc1ccc2c(c1)CCN(C1CCN(c3cc(Oc4ccc(N)c(C)c4)ncn3)CC1)C(=O)N2 to produce COc1ccc2c(c1)CCN(C1CCN(c3cc(Oc4ccc(NC(C)=O)c(C)c4)ncn3)CC1)C(=O)N2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.