Using Br, CC(=O)c1ccc(OCc2ccccc2)c(CCOCc2ccccc2)c1 to produce O=C(CBr)c1ccc(OCc2ccccc2)c(CCOCc2ccccc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.