2-Methyl-4-[[2-(2-pyridinyl)hydrazono]methyl]-5-(hydroxymethyl)pyridine-3-ol;3-Hydroxy-5-(hydroxymethyl)-2-methyl-4-pyridinecarbaldehyde (pyridin-2-yl)hydrazone;Pyridoxal (2-pyridyl)hydrazone
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