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Natural Product Research
Formerly Natural Product Letters
Volume 33, 2019 - Issue 5
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Research Articles

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

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Pages 681-686 | Received 12 Sep 2017, Accepted 07 Nov 2017, Published online: 22 Nov 2017
 

Abstract

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 IC50 values of 113.33 ± 1.53 and 40.33 ± 2.08 mg/L, respectively.

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