A method for the determination of the pyrrolizidine alkaloids from Senecio jacobaea (Compositae) by 1H and 13C NMR is presented. 1H NMR is a reliable method for the determination of the total alkaloid level. 13C NMR appears to be a suitable method for the determination of the individual alkaloids. The same techniques can also be applied to other plants containing pyrrolizidine alkaloids.
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Pieters et al. (1989) studied this question.
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