Using COC(=O)CC(Br)C(=O)OC, CCOC(=O)c1c2cccccc-2[nH]c1=O to produce CCOC(=O)c1c2cccccc-2n(C(CC(=O)OC)C(=O)OC)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.