CAT and cancer: However, adding these different ROS or RNS scavengers, such as ROS scavenger of N-acetylcysteine (NAC), sodium pyruvate, catalase (specific for H2O2), mannitol and 4-hydroxy-2,2,6,6-tetramethylpiperidinyloxy (specific for O2•-), and RONS scavenger of butylated hydroxyanisole (BHA), Trolox, and 2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide (cPTIO, specific for NO•), inhibited the NBP-induced apoptosis of cancer cell, indicating the roles of ROS and RNS in apoptotic signal activation in cancer cells (Table 1).