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Identification of a diastereomer of penicilloic acid during acid-mediated degradation of 6-aminopenicillanic acid
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DOI：10.1016/j.xphs.2026.104361.png)
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Abstract
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• Time-resolved NMR reveals degradation pathway of 6-APA. • Identification of a diastereomer of penicilloic acid. • Evidence consistent with C6 epimerization under acidic conditions. • Acid concentration controls degradation kinetics and product distribution.
Keywords:
Pharmaceutical analysis
Degradation product
Nuclear Magnetic Resonance (NMR) spectroscopy
High-performance liquid chromatography
Mass spectrometry
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