Using NNc1cc(Br)ccc1C(=O)O, CCOC(=O)C1CCCC(=O)C1 to produce CCOC(=O)C1CCc2c([nH]c3c(C(=O)O)ccc(Br)c23)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.