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Antioxidant Phenolic Glycosides from Moricandia arvensis
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Section:Abstract
The new phenolic glycosides quercetin 3,4‘-di-O-β-d-glucopyranoside-7-O-α-l-rhamnopyranoside (moricandin) (1), β-d-glucopyranosyl 4-O-β-d-glucopyranosylcaffeate (2), methyl 3-O-β-d-glucopyranosyl-5-hydroxycinnamate (3), and β-d-glucopyranosyl 4-O-β-d-glucopyranosylbenzoate (4), together with the previously known β-d-glucopyranosyl 4-hydroxybenzoate (5), methyl 4-O-β-d-glucopyranosylcaffeate (6), 1-O-caffeoyl-β-d-glucopyranoside (7), and 2-phenylethyl-β-d-glucopyranoside (8), were isolated from the flowers of Moricandia arvensis. Their structures were elucidated by extensive spectroscopic analysis and chemical methods. Compounds 1−8 were evaluated for antioxidant activity using DPPH, TEAC, and reducing power assays, where the caffeic acid derivative 7 and the quercetin triglycoside 2 proved to possess the most potent scavenging activity.
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History
- Published In Issue April 22, 2005
- Received December 27, 2004
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