Using Cn1cnc2c1c(=O)[nH]c(=O)n2C, O=C(c1ccc(Cl)cc1)c1ccc(CBr)cc1 to produce Cn1cnc2c1c(=O)n(Cc1ccc(C(=O)c3ccc(Cl)cc3)cc1)c(=O)n2C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.