英文别名(3R)-3-Amino-4-(2,4-difluorophenyl)-1-[3-(trifluoromethyl)-5,6-dihydro[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl]-1-butanone phosphate (1:1); 1-Butanone, 3-amino-4-(2,4-difluorophenyl)-1-[5,6-dihydro-3-(trifluoromethyl)-1,2,4-triazolo[4,3-a]pyrazin-7(8H)-yl]-, (3R)-, phosphate (1:1); (3R)-3-amino-4-(2,4-difluorophenyl)-1-(3-(trifluoromethyl)-6,8-dihydro-5H-(1,2,4)triazolo(4,3-a)pyrazin-7-yl)butan-1-one;phosphoric acid; 5-Desfluoro Sitagliptin; (R)-3-Amino-4-(2,4-difluorophenyl)-1-(3-(trifluoromethyl)-5,6-dihydro-[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl)butan-1-one-phosphate; (R)-7-[3-Amino-1-oxo-4-(2,4-difluorophenyl)butyl]-5,6,7,8-tetrahydro-3-(trifluoromethyl)-1,2,4-triazolo[4,3-a]pyrazine phosphate (1:1); Sitagliptin EP Impurity C; Sitagliptin Impurity 5; (R)-4-Oxo-4-[3-(trifluoromethyl)-5,6-dihydro[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl]-1-(2,4-difluorophenyl)butan-2-amine phosphate; 5-Desfluoro Sitagliptin Phosphate; Sitagliptin EP Impurity C Phosphate 
