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Quantitative analysis of pyrrolizidine alkaloid mixtures from Senecio vulgaris by carbon-13 nuclear magnetic resonance spectroscopy

✍ Scribed by L. A. C. Pieters; A. J. Vlietinck

Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
294 KB
Volume
25
Category
Article
ISSN
0749-1581

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✦ Synopsis

A I3C NMR method has been developed for obtaining simultaneously structural and quantitative information on mixtures of pyrrolizidine alkaloids from Senecio vulgaris L. (Compositae). The samples contained seneciphylline, senecionine, retrorsine and the corresponding E geometrical isomers, spartioidine, integerrimine and usaramine. The spin-lattice relaxation times were measured and, after establishing the instrumental requirements for quantitative C IT NMR, all the alkaloids of the mixture could be determined. Quantitative 'H and I3C IT NMR analyses were carried out, and the advantages and limitations of these methods are discussed.

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