Using CCOC(=O)Cn1c(=O)[nH]c(=O)c2cc(Cl)c(Cl)cc21, Fc1cc(Br)ccc1CBr to produce CCOC(=O)Cn1c(=O)n(Cc2ccc(Br)cc2F)c(=O)c2cc(Cl)c(Cl)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.