Sitagliptin FP Impurity B

Sitagliptin FP Impurity B ; Sitagliptin Triazecine Analog ; 10-(2,4,5-Trifluorobenzyl)-3-(trifluoromethyl)-6,7,10,11-tetrahydro [1,2,4] triazolo [3,4-c][1,4,7]triazecine-8,12(5H,9H)-dione ;