2-Methyl-3-hydroxy-4-hydroxymethyl-5-(mercaptomethyl)pyridine hydrochloride 3-(Mercaptomethyl)-5-hydroxy-6-methyl-4-pyridinemethanol hydrochloride 4-Pyridinemethanol, 3-hydroxy-5-(mercaptomethyl)-2-methyl-, hydrochloride 5'-Thiopyridoxal hydrochloride 5-Mercaptopyridoxin hydrochlorid 876-85-7 NSC526971