tert-butyl (2R)-2-methyl-4-oxopyrrolidine-1-carboxylate
(1R,4R)-tert-butyl 2-oxa-5-azabicyclo[2.2.1]heptane-5-carboxylate
tert-butyl (2R,4R)-4-{[tert-butyl(dimethyl)silyl]oxy}-2-[{(4-[3-chloro-4-fluoroanilino]-7-methoxyquinazolin-5-yl)oxy}methyl]-pyrrolidine-1-carboxylate