[1,1-dimethyl-2-oxo-2-(4-{3-[2-(tetrahydropyran-4-ylamino)pyridin-4-yl]-[2,6]naphthyridin-1-yl}piperazin-1-yl)ethyl]carbamic acid tert-butyl ester

4-[3-(2-chloropyridin-4-yl)[2,6]naphthyridin-1-yl]piperazine-1-carboxylic acid tert-butyl ester

1-chloro-3-(2-chloropyridin-4-yl)-2,6-naphthyridine

3-(2-chloropyridin-4-yl)-1H-pyrano[4,3-c]pyridin-1-one

3-(2-chloropyridin-4-yl)-2,6-naphthyridin-1-ol