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