Pyridoxal Isonicotinoyl Hydrazone

2-[[3-Hydroxy-5-(hydroxymethyl)-2-methyl-4-pyridinyl]methylene]hydrazide-4-pyridinecarboxylic Acid; [[3-Hydroxy-5-(hydroxymethyl)-2-methyl-4-pyridyl]methylene]hydrazideisonicotinic Acid; NSC 77674; PIH;