Using COC=C(c1ccc(Cl)cc1C)c1c(-c2ccccn2)nn(C)c1Cl to produce Cc1cc(Cl)ccc1C(C=O)c1c(-c2ccccn2)nn(C)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.