Using C=CS(C)(=O)=O, CCOCc1nc2cnc3ccccc3c2n1CC1(O)CCN(C(=O)OC(C)(C)C)CC1 to produce CCOCc1nc2cnc3ccccc3c2n1CC1(OCCS(C)(=O)=O)CCN(C(=O)OC(C)(C)C)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.