Using O=C(O)c1cccc(C2=C(c3cc(Br)ccc3O)CCC2)c1, BrCc1ccccc1 to produce O=C(O)c1cccc(C2=C(c3cc(Br)ccc3OCc3ccccc3)CCC2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.