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Carbon-13 Nuclear Magnetic Resonance Spectroscopy. Structure of the Anticoagulant Warfarin and Related Compounds in Solution

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PMC
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  • Physical Sciences: Chemistry

Abstract

Carbon-13 nuclear magnetic resonance spectra have been obtained for the coumarin-related compounds warfarin and phenprocoumon. The spectral assignments indicate that warfarin exists as a mixture of cyclic hemiketal diastereomers in dimethyl sulfoxide solution. The sodium salt of warfarin exists as the ringopen form in water solution.

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