Name:3-(Trifluoromethyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrazine hydrochloride Use: For Sitagliptin CAS:762240-92-6 ... Name:3-(Trifluoromethyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo ... :Protected from light 3-(Trifluoromethyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrazine hcl