Abstract
As a part of our continuing search for bioactive constituents from Brassicaceae family, three new bis-thioglycosides (1–3) were isolated from the 80% MeOH extract of Nasturtium officinale, together with 13 known compounds (4–16). The chemical structures of three new bis-thioglycosides (1–3) were elucidated using NMR techniques (1H and 13C NMR, 1H–1H COSY, HSQC, and HMBC), HRESIMS, and a chemical method. All the compounds were evaluated for their inhibitory effects on nitric oxide (NO) levels in lipopolysaccharide (LPS)-stimulated murine microglia BV-2 cells. Among the isolates, compound 5 exhibited a strong inhibitory effect on NO production, and compounds 4 and 15 showed moderate inhibitory activities, suggesting the neuroprotective and anti-neuroinflammatory effects of bis-thioglycosides from N. officinale.
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