Using CN(C)C=O, COc1cccc(Cc2nc3n(-c4c(Cl)cc(Br)cc4Cl)[nH]c(C(C)C)c-3c(=O)n2)c1 to produce COc1cccc(Cc2nc3n(-c4c(Cl)cc(C=O)cc4Cl)[nH]c(C(C)C)c-3c(=O)n2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.