Using O=C(CBr)OCc1ccccc1, COC(=O)c1cc(O)c2ccc(C)cc2n1 to produce COC(=O)c1cc(OCC(=O)OCc2ccccc2)c2ccc(C)cc2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.