alexa Captopril and its probable contaminants: NMR and MS features of analytical value.


Advanced Techniques in Biology & Medicine

Author(s): Casy AF, Dewar GH

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Abstract The 400 MHz 1H NMR spectrum of captopril in a variety of solvents is analysed and compared with those of epicaptopril and its disulphide analogue. A method for detecting isomeric and oxidative impurities by examination of a 1H NMR spectrum of captopril in DMSO-d6 is proposed. 13C NMR and MS data enable differentiation of captopril from its disulphide analogue but not from its diastereoisomer epicaptopril.
This article was published in J Pharm Biomed Anal and referenced in Advanced Techniques in Biology & Medicine

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