Using CC(=O)c1ccc(OC2CCCCO2)cc1, O=Cc1cccc(Br)c1 to produce O=C(C=Cc1cccc(Br)c1)c1ccc(OC2CCCCO2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.