title: Carbon-13 magnetic resonance spectroscopy of drugs III: penicillins.
abstract: The natural abundance 13C-NMR spectra of a series of penicillins (penicillin V methyl ester, penicillin V, penicillin G, methicillin, oxacillin, cloxacillin, and dicloxacillin) were studied. The chemical shifts were assigned using the pulse Fourier transform technique with the aid of long-range carbon-13 hydrogen coupling. The previous assignments of pencillin V methyl ester were revised.
mesh_terms: D002247:Carbon Isotopes; D009682:Magnetic Resonance Spectroscopy; D010406:Penicillins / Q000032:analysis*
chemical_list: D002247:Carbon Isotopes; D010406:Penicillins