title: Configuration and conformation of disulfide analogs of penicillins.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D002942:Circular Dichroism; D004220:Disulfides; D008961:Models, Structural; D008968:Molecular Conformation; D010406:Penicillins; D014961:X-Ray Diffraction
chemical_list: D004220:Disulfides; D010406:Penicillins