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Tu, Wen-Chao, Ding, Lin-Fen, Peng, Li-Yan, Song, Liu-Dong, Wu, Xing-De, Zhao, Qin-Shi (2022): Cassane diterpenoids from the seeds of Caesalpinia bonduc and their nitric oxide production and α-glucosidase inhibitory activities. Phytochemistry (112973) 193: 112973, DOI: 10.1016/j.phytochem.2021.112973, URL: http://dx.doi.org/10.1016/j.phytochem.2021.112973

Four new norceanothane-type triterpenes, cyclopalin A-D (1-4), and sixteen known compounds (5-20) were obtained from the fruits of Cyclocarya paliurus. Their structures were determined by spectroscopic data, experimental electronic circular dichroism (ECD) and X-ray single crystal analyses. All isolated compounds were assayed for their anti-HIV-1IIIB activity. Compound 18 exhibited potent anti-HIV-1IIIB activity with an EC50 value of 1.32 μM (SI = 151.52).