4-benzylamino-6-methoxy-[1,5]naphthyridin-3-ol

tert-butyl (6-(2-((4-amino-6-methoxy-1,5-naphthyridin-3-yl)oxy)acetyl)pyridin-3-yl)carbamate

[6-(6-methoxy-3,4-dihydro-2H-1-oxa-4,5,9-triaza-phenanthren-3-yl)-pyridin-3-yl]-carbamic acid tert-butyl ester

tert-butyl (6-(9-methoxy-1-methyl-2,3-dihydro-1H-[1,4]oxazino[2,3-c][1,5]naphthyridin-2-yl)pyridin-3-yl)carbamate