Using CCS, COc1ccc(C(=O)C2=C(c3ccccc3)c3ccc(OC)cc3C2)cc1 to produce O=C(C1=C(c2ccccc2)c2ccc(O)cc2CC1)c1ccc(O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.