1198-26-1 2-Methyl-3-hydroxy-4-(mercaptomethyl)-5-hydroxymethylpyridine hydrochloride 3-Pyridinemethanol, 5-hydroxy-4-(mercaptomethyl)-6-methyl-, hydrochloride 4-(Mercaptomethyl)-5-hydroxy-6-methyl-3-pyridinemethanol hydrochloride 4-Mercaptopyridoxin hydrochloride NSC526970