2-chloro-N-(1-methyl-1H-imidazol-4-yl)pyrido[3,4-d]pyrimidin-4-amine 、
1-(3,5-二氟吡啶-2-基)乙胺盐酸盐 以providing the title product (105 mg) as a racemic mixture的产率得到N2-[1-(3,5-Difluoropyridin-2-yl)ethyl]-N4-(1-methyl-1H-imidazol-4-yl)pyrido[3,4-d]pyrimidine-2,4-diamine