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Abstract
The genus Priestleya is known to contain the bipiperidyl alkaloid anabasine and an alkaloid tentatively identified as lupanine. In a study of 16 different species, several quinolizidine alkaloids and some bipiperidyl alkaloids were identified. A remarkable difference was found between the two sections of Priestleya: sect. Priestleya contains sparteine, lupanine and other tetracyclic quinolizidine alkaloids, while the sect. Anisothea contains the bipiperidyl alkaloid anabasine and the bicyclic quinolizidine lupinine. The chemical distinction agrees with morphological evidence that the generic concept of Priestleya is artificial and that two distinct genera should be recognized.
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