Using O=C(CBr)OCc1ccccc1, CN(CC(=O)c1ccc(O)cc1)C(=O)OC(C)(C)C to produce CN(CC(=O)c1ccc(OCC(=O)OCc2ccccc2)cc1)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.