西他列汀是二肽基肽酶-4（DPP-4）抑制劑類的口服降糖藥(抗糖尿病藥物)，這種酶抑制藥物單獨使用或與其他口服降血糖劑（如二甲雙胍或噻唑烷二酮）聯(lián)合使用治療2型糖尿病。
1-(3-(Trifluoromethyl)-5,6-dihydro-[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl)-4-(2,4,5-trifluorophenyl)butane-1,3-dione
3-(Trifluoromethyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrazine hydrochloride
5-(1-Hydroxy-2-(2,4,5-trifluorophenyl)ethylidene)-2,2-dimethyl-1,3-dioxane-4,6-dione
3-(Trifluoromethyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrazine
(R)-tert-Butyl (4-oxo-4-(3-(trifluoromethyl)-5,6-dihydro-[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl)-1-(2,4,5-trifluorophenyl)butan-2-yl)carbamate
(S)-2-Amino-2-phenylacetamide
(Z)-Methyl 3-acetamido-4-(2,4,5-trifluorophenyl)but-2-enoate
(2Z)-4-Oxo-4-[3-(trifluoromethyl)-5,6-dihydro[1,2,4]triazolo[4,3-a]pyrazine-7(8H)-yl]-1-(2,4,5-trifluorophenyl)but-2-en-2-amine
(R)-Methyl 3-acetamido-4-(2,4,5-trifluorophenyl)butanoate
(R)-3-((Benzyloxy)amino)-4-(2,4,5-trifluorophenyl)butanoic acid
(S)-3-Hydroxy-4-(2,4,5-trifluorophenyl)butanoic acid
3-(Trifluoromethyl)-[1,2,4]triazolo[4,3-a]pyrazine
