Using [N-]=[N+]=[N-], CC(C)(C)OC(=O)N1C2CCC1C(COS(C)(=O)=O)C2 to produce CC(C)(C)OC(=O)N1C2CCC1C(CN=[N+]=[N-])C2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.