title: Density functional theory calculation of 13C NMR shifts of diazaphenanthrene alkaloids: reinvestigation of the structure of samoquasine A.
mesh_terms: D000470:Alkaloids / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010616:Phenanthrenes / Q000737:chemistry*; D011789:Quantum Theory; D011799:Quinazolines / Q000737:chemistry*
chemical_list: D000470:Alkaloids; D010616:Phenanthrenes; D011799:Quinazolines; C421084:perlolidine; C031181:phenanthrene