A syringic acid derivative and two iridoid glycosides from the roots of Stachys geobombycis and their antioxidant properties

A new derivative of syringic acid, stageobester A (1) and two iridoid glycosides which including a new one, stageoboside A (2), were isolated from the roots of Stachys geobombycis. Their structures were elucidated on the basis of spectroscopic methods, including extensive NMR and MS spectra. In addi...

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Published inNatural product research Vol. 33; no. 5; pp. 681 - 686
Main Authors Zhou, Xianli, Huang, Sixin, Wang, Pengcheng, Luo, Qin, Huang, Xiao, Xu, Qin, Qin, Jiangke, Liang, Chengqin, Chen, Xu
Format Journal Article
LanguageEnglish
Published England Taylor & Francis 04.03.2019
Taylor & Francis Ltd
Subjects
Acids
antioxidant
Antioxidants
Glycosides
iridoid glycoside
NMR
Nuclear magnetic resonance
Roots
Stachys
Stachys geobombycis
syringic acid derivative
Stachys geobombycis
antioxidant
iridoid glycoside
syringic acid derivative
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Summary:A new derivative of syringic acid, stageobester A (1) and two iridoid glycosides which including a new one, stageoboside A (2), were isolated from the roots of Stachys geobombycis. Their structures were elucidated on the basis of spectroscopic methods, including extensive NMR and MS spectra. In addition, all the isolates were tested for their antioxidant capacity. Compounds 1 and 2 showed moderate antioxidant activities against DPPH radical, with IC 50 values of 113.33 ± 1.53 and 40.33 ± 2.08 mg/L, respectively.
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ISSN:1478-6419
1478-6427
DOI:10.1080/14786419.2017.1405413