2-[1-(4,4-Difluorocyclohexyl)-4-piperidinyl]-6-fluoro-2,3-dihydro-3-oxo-1H-isoindole-4-carboxamide is a nuclear protein poly(ADP-ribose) polymerase-1 (PARP-1) inhibitor. PARP-1 is involved with the signaling and repair of DNA and a target in oncology.