Sitagliptin D6

Chemical Name: (3R)-3-Amino-1-[5,6-dihydro-5,6-d2-3-(trifluoromethyl)-1,2,4-triazolo[4,3-a]pyrazin-7(8H)-yl-5,6,8,8-d4]-4-(2,4,5-trifluorophenyl)-1-butanone 

Smile: FC(F)(C1=NN=C2N1C([2H])([2H])C([2H])([2H])N(C(C[C@H](N)CC3=C(C=C(C(F)=C3)F)F)=O)C2([2H])[2H])F