Nudifloramide-13C,d3 (2PY-13C,d3) is the 13C- and deuterium labeled Nudifloramide (HY-113432). Nudifloramide (2PY) is one of the end products of nicotinamide-adenine dinucleotide (NAD) degradation. Nudifloramide significantly inhibits poly(ADP-ribose) polymerase (PARP-1) activity in vitro[1].