Using COc1ccc(C(=O)c2c(-c3ccc(O)cc3)sc3cc(O)ccc23)cc1 to produce O=C(c1ccc(O)cc1)c1c(-c2ccc(O)cc2)sc2cc(O)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.