Also available in 1 mg, 2 mg, 5 mg, 25 mg, 50 mg, 100 mg, 1 mL 10 mM (in DMSO) and bulk. Please contact Fisher for quotes. GSK872 HCl(1346546-69-7 free base) (GSK2399872A) is an effective and specific RIP3 kinase inhibitor. It binds RIP3 kinase domain with high affinity (IC50, 1.8 nM) and inhibits kinase activity (IC50, 1.3 nM). purity: 99%