Stemtuberolines A-G, new alkaloids from Stemona tuberosa and their anti-TMV activity.

Fitoterapia

State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China; State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, PR China. Electronic address:

Published: June 2020

Three new tuberostemoamide-type alkaloids, stemtuberolines A-C (1-3), four new stenine-type alkaloids, stemtuberolines D-G (4-7), together with five known Stemona alkaloids (8-12), were isolated from the roots of Stemona tuberosa. Their structures were elucidated on the basis of comprehensive spectroscopic data analysis. Stemtuberoline C (3) exhibited significant anti-TMV activity with an inhibition rate of 60.48% at the concentration of 50 μg/mL, while that of ningnamycin, the positive control, was 52.89%.

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Source
http://dx.doi.org/10.1016/j.fitote.2020.104572DOI Listing

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