Using OC[C@H]1O[C@@H](c2ccc(Cl)c(Cc3ccc(O)cc3)c2)[C@H](O)[C@@H](O)[C@@H]1O, BrC/C=C/C1CC1 to produce OC[C@H]1O[C@@H](c2ccc(Cl)c(Cc3ccc(OC/C=C/C4CC4)cc3)c2)[C@H](O)[C@@H](O)[C@@H]1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.