A potent necroptosis inhibitor. Displays higher activity in inhibiting necroptosis in Jurkat cells than Nec-1 (Cat. No. 1864) (EC₅₀ = 210 nM versus EC₅₀ = 490 nM), as well as showing no nonspecific cytotoxicity at high concentrations (~100 mM). More useful for in-cell and in vivo experiments compared to Nec-1.