4-Hydroxythiamine 5-(2-Hydroxyethyl)-3-(4-hydroxy-2-methylpyrimidin-5-ylmethyl)-4-methylthiazolium chloride 582-36-5 EINECS 209-483-4 Hydroxythiamine NSC 56348 Oxythiamine Oxythiamine chloride Thiazolium, 3-((1,4-dihydro-2-methyl-4-oxo-5-pyrimidinyl)methyl)-5-(2-hydroxyethyl)-4-methyl-, chloride (8CI)(9CI)