Using COc1ccc(C(=O)c2c(-c3ccccc3)oc3ccccc23)cc1 to produce O=C(c1ccc(O)cc1)c1c(-c2ccccc2)oc2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.