英文名称:1-Butanone, 3-Amino-4-(2,5-Difluorophenyl)-1-[5,6-Dihydro-3-(Trifluoromethyl)-1,2,4-Triazolo[4,3-A]Pyrazin-7(8H)-Yl]-; 7-[3-Amino-1-Oxo-4-(2,5-Difluorophenyl)Butyl]-5,6,7,8-Tetrahydro-3-(Trifluoromethyl)-1,2,4-Triazolo[4,3-A]Pyrazine; 3-Amino-4-(2,5-Difluorophenyl)-1-(3-(Trifluoromethyl)-5,6-Dihydro-[1,2,4]Triazolo[4,3-A]Pyrazin-7(8H)-Yl)Butan-1-One; Rac-Sitagliptin Ep Impurity B Hcl; Rac-Sitagliptin-Desfluoro Impurity; Rac-Sitagliptin 4-Desfluoro Impurity; rac-Sitagliptin EP Impurity B HCl