SEARCH Articles Figures Tables 4- Methyl-benzo -1,7-naphthyridine 4- Substituted benzo naphthyridines Benzo -1,6-naphthyridine-3-carboxylates Benzo -2,7-naphthyridine, preparation Benzo naphthyridine-2-carboxylate Benzo naphthyridines Benzo naphthyridines