2-(1-Propyl-4-piperidinyl)-1H-benzimidazole-7-carboxamide-d3, is the labeled analogue of 2-(1-Propyl-4-piperidinyl)-1H-benzimidazole-7-carboxamide (P838410), used in the synthesis of PARP-1 inhibitors, involved in DNA repair, and RNA transcription modulation.