title: Determination of the configuration of some penicillin S-oxides by 13C nuclear magnetic resonance spectroscopy.
mesh_terms: D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D008722:Methods; D008968:Molecular Conformation; D010406:Penicillins; D013454:Sulfoxides
chemical_list: D010406:Penicillins; D013454:Sulfoxides