The molecule is dianion of thiamine(1+) diphosphate arising from deprotonation of the three OH groups of the diphosphate. It has a role as a cofactor. It is a conjugate base of a thiamine(1+) diphosphate.
[2-[3-[(4-amino-2-methylpyrimidin-5-yl)methyl]-4-methyl-1,3-thiazol-3-ium-5-yl]ethoxy-oxidophosphoryl] phosphate