ChEBI: Sitagliptin is a triazolopyrazine that exhibits hypoglycemic activity. It has a role as a serine proteinase inhibitor, a hypoglycemic agent, an EC 3.4.14.5 (dipeptidyl-peptidase IV) inhibitor, an environmental contaminant and a xenobiotic. It is a triazolopyrazine and a trifluorobenzene.