Using O=C(CBr)N1Cc2ccccc2Oc2ccccc21, COC(=O)c1ccc(O)cc1 to produce COC(=O)c1ccc(OCC(=O)N2Cc3ccccc3Oc3ccccc32)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.