PNR-3-80 is a selective Apoptotic endonuclease G (EndoG) inhibitor with an IC50 of 0.67 μM for EndoG over DNase I. PNR-3-80 does not have inhibitory activities for DNase II, RNase A, proteinase, lactate dehydrogenase and superoxide dismutase 1. PNR-3-80 has a potent cytoprotective activity, and it significantly protects human prostate carcinoma cells from Cisplatin and Docetaxel (HY-B0011) -induced cell death and represses Etoposide (HY-13629) -induced DNA damage and autophagy. PNR-3-80 can be used for cell injuries research[1][2].