Using O=C(O)c1ccc(NCCCCCCCCCCCCCCCCBr)cc1, CC(O)C(=O)O to produce CC(OC(=O)c1ccc(NCCCCCCCCCCCCCCCCBr)cc1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.