Four new phenolic glycosides from Dobinea delavayi

Abstract

Three new benzophenone glycosides, 2-O-β-D-glucopyranosyl-6,3',4'-trihydroxy-4-methoxybenzophenone (1), 4'-O-β-D-glucopyranosyl-2,4,6,3'-tetramethoxybenzophenone (2) and 2-O-β-D-glucopyranosyl-4'-hydroxy-6-methylbenzophenone (3), and a new flavonoid glycoside 5'-hydroxyombuoside (6), along with three known phenolic glycosides 4-O-β-D-glucopyranosyl-2,6,4'-trihydroxybenzophenone (4), mangiferin (5), and ombuoside (7), were isolated from the 80% ethanol extract of roots of Dobinea delavayi. Their structures were determined by the comprehensive analyses of the physicochemical properties and spectroscopic data (1D NMR, 2D NMR, and HR-ESI-MS). Cytotoxicity and in vitro antimalarial activity of compounds 1, 3, 4, 6, and 7 were evaluated by MTT colorimetric assay and β-hematin formation inhibition assay, respectively.

Graphical Abstract

Keywords:

• Dobinea delavayi
• Anacardiaceae
• benzophenone glycosides
• flavonoid glycosides
• structural elucidation
• cytotoxicity
• antimalarial activity

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

The work was financially supported by the National Natural Science Foundation of China [grant number 81960637], Yunnan Key Laboratory of Screening and Research on Anti-pathogenic Plant Resources from Western Yunnan [Cultivation, grant number 202105AG070003], and the Innovation Team Project of Dali University for Development and Utilization of Characteristic Medicinal Plants in Western Yunnan & Bai Nationality Medicines [grant number ZKLX2019106].