Abstract
Three new acylated flavonoid C-glycosides, 6‴-(-)-phaseoylspinosin (1), 6‴-(3″″,4″″,5″″-trimethoxyl)-(E)-cinnamoylspinosin (2), and 6‴-(4″″-O-β-D-gluco-pyranosyl)-benzoylspinosin (3), were isolated from the seeds of Ziziphus mauritiana (Rhamnaceae). A further 19 known compounds including eight spinosin analogues (4–11) were also isolated. Their structures were elucidated by means of spectroscopic analysis and chemical method. Among spinosin derivatives 1, 2, 4, 7, 8, and triterpenoid saponin 14, jujuboside A (14) displayed moderate acetylcholinesterase (AchE) inhibitory activity with an inhibition value of 46.2% at a concentration of 1 µM. 
Electronic Supplementary Material
Supplementary material is available for this article at 10.1007/s13659-013-0028-5 and is accessible for authorized users.
Keywords: Ziziphus mauritiana, Rhamnaceae, seeds, spinosin derivatives, jujuboside A, acetylcholinesterase inhibitory
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Contributor Information
Min Xu, Email: xumin@mail.kib.ac.cn.
Ying-Jun Zhang, Email: zhangyj@mail.kib.ac.cn.
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