Using COc1ccc(CCc2ccc(NC(=O)c3ccc(Cl)cc3O)cc2)cc1OC to produce O=C(Nc1ccc(CCc2ccc(O)c(O)c2)cc1)c1ccc(Cl)cc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.