Using O=C(CBr)c1ccc(OCc2ccccc2)cc1, O=Cc1cc(Br)ccc1O to produce O=C(c1ccc(OCc2ccccc2)cc1)c1cc2cc(Br)ccc2o1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.