Using O=C1C(Cl)CCc2ccccc2N1c1ccccc1, [N-]=[N+]=[N-] to produce [N-]=[N+]=NC1CCc2ccccc2N(c2ccccc2)C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.