Using CCOC(=O)C(C)(C)Sc1ccc2c(-c3ccc(Cl)cc3)noc2c1, O=CO to produce CCOC(=O)C(C)(C)S(=O)c1ccc2c(-c3ccc(Cl)cc3)noc2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.