Using O=C([O-])[O-], COc1ccc(CNc2nnc(Cl)c3ccc(Cl)cc23)cc1Cl to produce COc1ccc(CNc2nnc(N(C)CCCO)c3ccc(Cl)cc23)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.