title: C-13 NMR spectra of barbituric acid derivatives. II.
mesh_terms: D001463:Barbiturates / Q000032:analysis*; D002247:Carbon Isotopes; D055598:Chemical Phenomena; D002621:Chemistry; D009682:Magnetic Resonance Spectroscopy; D013329:Structure-Activity Relationship
chemical_list: D001463:Barbiturates; D002247:Carbon Isotopes