Using [N-]=[N+]=[N-], CC(=O)N1CCN(c2ccc(CCc3ccc(CCl)cc3)nc2)CC1 to produce CC(=O)N1CCN(c2ccc(CCc3ccc(CN=[N+]=[N-])cc3)nc2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.