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Pyrrolizidine alkaloids from Werneria nubigena

✍ Scribed by Dr. Erhard Roeder; Thomas Bourauel; Ingeborg Theisen

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
249 KB
Volume
1
Category
Article
ISSN
1056-9014

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## Abstract Three new pyrrolizidine alkaloids, leptanthine (**2**), its corresponding __N__‐oxide **1**, and __N__‐oxide of 3′‐__O__‐acetylechihumiline (**3**), were isolated from the aerial parts of __Onosma leptantha__, together with two known alkaloids of the same type, echihumiline (**5**) and