(R)-3-[2-(2-chloropyridin-4-yl)-5-methoxypyrido[3,4-d]pyrimidin-4-ylamino]pyrrolidine-1-carboxylic acid tert-butyl ester 、
4-(四氢吡喃-4-基)苯胺 以Product isolated as the trifluoroacetic salt as a yellow lyophilate (0.109 g, 81%)的产率得到(5-Methoxy-2-{2-[4-(tetrahydro-pyran-4-yl)-phenylamino]-pyridin-4-yl}-pyrido[3,4-d]pyrimidin-4-yl)-(R)-pyrrolidin-3-yl-amine