Using CNS(=O)(=O)Oc1ccc2c(c1)C(C)(C)C(O)O2, CO to produce CNS(=O)(=O)Oc1ccc2c(c1)C(C)(C)C(OC)O2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.