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  • Title: Phenylethanoid and flavone glycosides from Ruellia tuberosa L.
    Author: Phakeovilay C, Disadee W, Sahakitpichan P, Sitthimonchai S, Kittakoop P, Ruchirawat S, Kanchanapoom T.
    Journal: J Nat Med; 2013 Jan; 67(1):228-33. PubMed ID: 22447282.
    Abstract:
    A new phenylethanoid glycoside, isocassifolioside (8), and two new flavone glycosides, hispidulin 7-O-α-L-rhamnopyranosyl-(1'″ → 2″)-O-β-D-glucuronopyranoside (11) and pectolinaringenin 7-O-α-L-rhamnopyranosyl-(1'″ → 2″)-O-β-D-glucuronopyranoside (12) were isolated from the aerial portions of Ruellia tuberosa L., together with verbascoside (1), isoverbascoside (2), nuomioside (3), isonuomioside (4), forsythoside B (5), paucifloside (6), cassifolioside (7), hispidulin 7-O-β-D-glucuronopyranoside (9) and comanthoside B (10). The structure elucidations were based on analyses of chemical and spectroscopic data including 1D- and 2D-NMR. The isolated compounds 1-12 exhibited radical scavenging activity using ORAC assay.
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