Using O=C(O)CC(Cc1ccccc1)S(=O)(=O)c1ccc(Br)cc1, C=Cc1ccc(OC)cc1 to produce O=C(O)CC(Cc1ccccc1)S(=O)(=O)c1ccc(C=Cc2ccccc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.