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Pyrrolizidine alkaloids from Lithospermum officinale

✍ Scribed by L. Krenn; H. Wiedenfeld; E. Roeder

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
268 KB
Volume
37
Category
Article
ISSN
0031-9422

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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