Synonyms: 4-Pyridinecarboxaldehyde,(4-pyridinylmethylene)hydrazone (9CI); Isonicotinaldehyde, azine (6CI,7CI,8CI);1,4-Bis(4-pyridyl)-2,3-diaza-1,3-butadiene; 4-Pyridinaldazine;4-Pyridinecarboxaldehyde azine; N,N'-Bis(1-(4-pyridyl)methylene)hydrazine; NSC66165; Pyridine-4-carboxaldazine