Synonyms: 2-Pyridinecarboxaldehyde,2-pyridinylhydrazone (9CI); Picolinaldehyde, 2-pyridylhydrazone (6CI,7CI,8CI);1,3-Bis(2'-pyridyl)-1,2-diazapropen-2-ene; 2,2'-Dipyridyl ketone hydrazone;2-Pyridinecarboxaldehyde 2-pyridylhydrazone; NSC 91513; PH 22;Pyridine-2-aldehyde 2-pyridylhydrazone; Pyridine-2-aldehyde2'-pyridylhydrazone; Pyridine-2-carbaldehyde 2-pyridylhydrazone