R406 (R-406)苯磺酸盐是一种可口服的、ATP竞争性Syk抑制剂，K_i为30 nM，IC₅₀为41 nM。

参考文献

1.Sylvia Braselmann, et al. R406, an orally available spleen tyrosine kinase inhibitor blocks fc receptor signaling and reduces immune complex-mediated inflammation. J Pharmacol Exp Ther. 2006 Dec;319(3):998-1008.

2.Hatton O, et al. Syk-induced phosphatidylinositol-3-kinase activation in Epstein-Barr virus posttransplant lymphoproliferative disorder. Am J Transplant. 2013 Apr;13(4):883-90.

冰袋运输。粉末直接保存于-20℃，有效期3年。建议分装后-20℃干燥保存，避免反复冻融。