title: Spectrophotometric determination of papaverine, theophylline, and phenobarbitone in some pharmaceutical preparations.
mesh_terms: D008722:Methods; D010208:Papaverine / Q000032:analysis*; D010634:Phenobarbital / Q000032:analysis*; D013056:Spectrophotometry, Ultraviolet; D013607:Tablets / Q000032:analysis; D013806:Theophylline / Q000032:analysis*
chemical_list: D013607:Tablets; D013806:Theophylline; D010208:Papaverine; D010634:Phenobarbital