Using CC(C)(C)OC(=O)N1CCCCC1CC(=O)O, O=C(CBr)c1ccccc1 to produce CC(C)(C)OC(=O)N1CCCCC1CC(=O)OCC(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.