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Sitagliptin Impurity 5 5-Desfluoro Sitagliptin Sitagliptin EP Impurity C 5-Desfluoro Sitagliptin Phosphate Sitagliptin EP Impurity C Phosphate Sitagliptin EP Impurity C (5-Desfluoro Sitagliptin) Sitagliptin EP Impurity CQ: What is Sitagliptin EP Impurity C Q: What is the CAS Number of Sitagliptin EP Impurity C (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 (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) Sitagliptin impurity 4/Sitagliptin EP Impurity C/Sitagliptin 5-Desfluoro Impurity/(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