15233-41-7 3-((4-Amino-2-methyl-5-pyrimidinyl)methyl)-4-methyl-5-thiazolidineethanol 5-Thiazolidineethanol, 3-((4-amino-2-methyl-5-pyrimidinyl)methyl)-4-methyl- NSC 165519 Tetrahydrothiamin Tetrahydrothiamine