Using O=S(=O)(OCC(F)(F)c1ccccn1)C(F)(F)F, [N-]=[N+]=[N-] to produce [N-]=[N+]=NCC(F)(F)c1ccccn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.