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Updated: Sep 22, 2025

Rapid High-throughput Species Identification of Botanical Material Using Direct Analysis in Real Time High Resolution Mass Spectrometry
Published on: October 2, 2016
Alkaloids from the stem of Ephedra equisetina
Deng-Hui Zhu1,2, Jing-Ke Zhang1,2, Ju-Fang Jia1,2
1School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, China.
Abstract:
Two new cyclotrypyamine alkaloids equisetinines A and B, as well as three known alkaloids (3-5) were isolated from the stems of Ephedra equisetina Bunge. Their structures were characterized by spectroscopic methods, and the absolute configurations of the new compounds were determined by interpretation of their electronic circular dichroism. Anti-asthmatic activities of compounds were evaluated by releasing β-Hex in C48/80-induced RBL-2H3 cells, and compound 5 exhibited significant anti-asthmatic activities.
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