[5-hydroxy-4-(hydroxymethyl)-6-methylpyridin-3-yl]methyl phosphate
[5-hydroxy-4-(hydroxymethyl)-6-methyl-3-pyridyl]methyl phosphate
(5-hydroxy-6-methyl-4-methylol-3-pyridyl)methyl phosphate
[5-hydroxy-4-(hydroxymethyl)-6-methyl-pyridin-3-yl]methyl phosphate