SEARCH Articles Figures Tables Marine pyridoacridine alkaloids Oceanapia pyridoacridine alkaloids from Pyridoacridine Pyridoacridine alkaloids kuanoniamine Pyridoacridine type alkaloids Pyridoacridine type alkaloids isolation and structure Pyridoacridine, Quinoacridine, and Related Alkaloids Pyridoacridines Tetracyclic pyridoacridine alkaloids