H. Benamar, L. Tomassini, C. Frezza
May 1, 2021
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Journal
Chemistry of Natural Compounds
Abstract
The ethanolic extract derived from the whole plant of Pardoglossum cheirifolium was submitted to phytochemical investigation. A new pyrrolizidine alkaloid, 3′-O-acetylleptanthine N-oxide (1), was isolated together with three known compounds of the same class, i.e., heliosupine N-oxide (2), heliosupine (3), and heliovicine (4). The structure of the new compound was elucidated after extensive mono- and bidimensional NMR experiments and confirmed by a MS experiment.