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Conversion of 17O/18O labelled δ-(L-α-aminoadlpyl)-L-cysteinyl-D-valine to 17O/18O labelled isopenicillin n in a cell-free extract of . A study by 17O-NMR spectroscopy and mass spectrometry

Medicinal ChemistryPharmaceutical ScienceBioorganic ChemistryLabelled Isopenicillin NBiochemistryMedicineNatural SciencesBioanalysisMass SpectrometryPharmacologyPharmaceutical Chemistry17O-nmr Spectroscopy