Using CC(=O)NC1Cc2cc(Br)c3[nH]c(=O)c(=O)[nH]c3c2C1 to produce CC(=O)NC1Cc2ccc3[nH]c(=O)c(=O)[nH]c3c2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.