Using CC(Br)Br, COc1ccc2c(Cc3ccc(O)cc3)c(-c3ccc(Cl)cc3)c(=O)oc2c1 to produce COc1ccc2c(Cc3ccc(OCCBr)cc3)c(-c3ccc(Cl)cc3)c(=O)oc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.