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Abstract
A new prenylated coumarin diglycoside, 6-prenylcoumarin-7-O-β-D-apiofuranosyl-(1→6)-β-D-glucopyranoside (1) and five known flavonoid glycosides (2–6) were isolated from the leaves and stems of Clausena dunniana. The structures of these isolates were elucidated based on comprehensive MS, UV, IR, and NMR spectroscopic data analysis and comparison with the data reported in literature. Compounds 2–6 are obtained from the title plant for the first time. All these isolates were evaluated for their insulin-release promoting effects, and compounds 1, 2, and 4 exhibited significant activities (2.0 to 3.3-fold higher in comparison with the control, p < 0.01) at 40 μM.
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Disclosure statement
No potential conflict of interest was reported by the authors.
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Funding
This work was financially supported by National Natural Science Foundation of China [NSFC; grant numbers 81973199, 81773864, and 81473106) and The Drug Innovation Major Project of China (No. 2018ZX09711001-008-003).