Using O=C(CBr)OCc1ccccc1, O=C1Oc2ccc(Cl)cc2C1c1ccccc1 to produce O=C(CC1(c2ccccc2)C(=O)Oc2ccc(Cl)cc21)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.