Using COc1cc(C(O)c2ccnn2C)c(Cl)c(Cl)c1OC, [O-]Cl to produce COc1cc(C(=O)c2c(Cl)cnn2C)c(Cl)c(Cl)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.