(1S,3aR,6aS)-(2S)-2-Cyclohexyl-N-(2-pyrazinylcarbonyl)glycyl-3-methyl-L-valyl-N-octahydrocyclopentapyrrole-1-carboxamide-d4

(1S,3aR,6aS)-(2S)-2-Cyclohexyl-N-(2-pyrazinylcarbonyl)glycyl-3-methyl-L-valyl-N-[(1R)-1-[2-(cyclopropylamino)-2-oxoacetyl]butyl]octahydrocyclopenta[c]pyrrole-1-carboxamide-d4 is deuterated labeled (1S,3aR,6aS)-(2S)-2-Cyclohexyl-N-(2-pyrazinylcarbonyl)glycyl-3-methyl-L-valyl-N-[(1R)-1-[2-(cyclopropylamino)-2-oxoacetyl]butyl]octahydrocyclopenta[c]pyrrole-1-carboxamide.