福他替尼是R406的活性代谢物的原药，是Syk抑制剂，IC50为41 nM，是美国食品和药物管理局自2018年以来批准的用于治疗慢性免疫性血小板减少症（ITP）的药物。该药物作为六水合二钠盐口服给药，并且是活性化合物他马替尼(R-406)的前药，该活性化合物是脾酪氨酸激酶(Syk)的抑制剂，因此它是syk抑制剂。
3,4,5-Trimethoxyaniline
6-[5-Fluoro-2-(3,4,5-trimethoxyphenylamino)pyrimidin-4-ylamino]-2,2-dimethyl-4H-pyrido[3,2-b][1,4]oxazin-3-one
(6-((5-Fluoro-2-((3,4,5-trimethoxyphenyl)amino)pyrimidin-4-yl)amino)-2,2-dimethyl-3-oxo-2H-pyrido[3,2-b][1,4]oxazin-4(3H)-yl)methyl dihydrogen phosphate
Di-tert-butyl chloromethyl phosphate
Sodium (6-((5-fluoro-2-((3,4,5-trimethoxyphenyl)amino)pyrimidin-4-yl)amino)-2,2-dimethyl-3-oxo-2,3-dihydro-4H-pyrido[3,2-b][1,4]oxazin-4-yl)methyl phosphate hexahydrate
6-((2-Chloro-5-fluoropyrimidin-4-yl)amino)-2,2-dimethyl-2H-pyrido[3,2-b][1,4]oxazin-3(4H)-one
