Journal
NATURAL PRODUCT RESEARCH
Volume 31, Issue 3, Pages 355-358Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786419.2016.1233410
Keywords
Stachys lavandulifolia; phenolic compounds; antioxidant activity; LC-ESI-MS; MS
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Funding
- Shahrood University of Technology
- Isfahan University of Technology
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The aim of this study was to evaluate phenolics profile and antioxidant activity of Stachys lavandulifolia. Total phenolics (TP), total flavonoids (TF), DPPH center dot assay (IC50), ferric ion reducing antioxidant power (FRAP) and total antioxidant capacity (TAC) of the methanolic extract were measured. The content of TP, TF, IC50, FRAP and TAC, were obtained as 16.59 gallic acid equiv./g dry matter (DM), 4.48mg quercetin equiv./g DM, 2.07 (g/mL), 0.014 (absorbance/mg phenolic) and 14.61 (mg BHT equiv./g DM), respectively. The results showed that S. lavandulifolia, compared to other species of Stachys, had moderate TP content with desirable antioxidant activity. Subsequently, 59 various phenolic compounds were identified and confirmed in the methanolic extract of S. lavandulifolia using high mass accuracy by MS2 experiments. The compounds consisted of 6 hydroxybenzoic acids and hydroxybenzoic aldehydes, 9 hydroxycinnamic acids, 1 coumarin, 32 flavonoids, 3 lignans, 2 stilbenes, 3 tannins and 3 other phenolics. [GRAPHICS] .
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