This technology includes synthesis of S-2-((S)-3-(4-chlorophenyl)-N'-((4-chlorophenyl) sulfonyl)-4-phenyl-4,5-dihydro-1 H-pyrazole-1-carboximidamido)- 3-(methyld3) butanamide-d5, octadeuterated JD5037 for possible use in clinical Absorption, Distribution, Metabolism, and Excretion (ADME) studies for drug discovery studies.