title: Application of proton and 13C-NMR spectroscopy to estimation of diastereoisomer ratio in phenethicillin.
abstract: A procedure for the determination of the diastereoisomer ratio in phenethicillin potassium and its formulations is described. The method utilizes analyses of PMR and 13C-NMR data. Assignments of 13C-chemical shifts in D- and L-phenethicillin potassium also are included.
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D008722:Methods; D010404:Penicillin V / Q000031:analogs & derivatives* / Q000032:analysis*; D011208:Powders / Q000032:analysis; D013237:Stereoisomerism; D013607:Tablets / Q000032:analysis
chemical_list: D011208:Powders; D013607:Tablets; D010404:Penicillin V