3-[(4-Amino-2-methyl-5-pyrimidinyl)methyl]-4-methyl-5-[4,6,6-trihydroxy-4,6-dioxo-3,5-dioxa-4,6-diphospha(V)hexan-1-yl]thiazol-3-ium

ChEBI: Thiamine(1+) diphosphate is a thiamine phosphate that is thiamine(1+) in which the hydroxy group has been replaced by a diphosphate group. It is the active form of vitamin B1 and an essential cofactor for enzymes in key metabolic pathways. It has a role as a fundamental metabolite and a cofactor. It is a vitamin B1 and a thiamine phosphate. It is a conjugate acid of a thiamine(1+) diphosphate(1-).