title: Structural characterization of an anhydropenicillin and its stereochemical relationship to penicillins.
mesh_terms: D000812:Anhydrides; D008968:Molecular Conformation; D010404:Penicillin V; D013237:Stereoisomerism; D013329:Structure-Activity Relationship; D014961:X-Ray Diffraction
chemical_list: D000812:Anhydrides; D010404:Penicillin V