Using CS(=O)(=O)N=[N+]=[N-], CCC(=O)CC(=O)C1(OC)CCN(C(=O)OC(C)(C)C)CC1 to produce CCC(=O)C(=[N+]=[N-])C(=O)C1(OC)CCN(C(=O)OC(C)(C)C)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.