Sitagliptin486460-32-6100 % similar Sitagliptin phosphate654671-78-087 % similar Sitagliptin phosphate monohydrate654671-77-983 % similar 1-[5,6-Dihydro-3-(trifluoromethyl)-1,2,4-triazolo[4,3-A]pyrazin-7(8H)-yl]-4-(2,4,5-trifluorophenyl)-1,3-butanedione764667-65-468 % similar Sitagliptin deamino impurity 11253056-18-661 % similar (2Z)-3-Amino-1-[5,6-dihydro-3-(trifluoromethyl)-1,2,4-triazolo[4,3-A]pyrazin-7(8H)-yl]-4-(2,4,5-trifluorophenyl)-2-buten-1-one767340-03-460 % similar 3-(Trifluoromethyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-A]pyrazine486460-21-332 % similar 3-(Trifluoromethyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-A]pyrazine hydrochloride762240-92-631 % similar