title: Phenylethanoid and flavone glycosides from Ruellia tuberosa L.
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.
authors.affiliation: Chemial Biology Program, Chulabhorn Graduate Institute, Bangkok, Thailand.
authors.forename: Chiobouaphong
authors.initials: C
authors.lastname: Phakeovilay
authors.forename: Wannaporn
authors.initials: W
authors.lastname: Disadee
authors.forename: Poolsak
authors.initials: P
authors.lastname: Sahakitpichan
authors.forename: Somkit
authors.initials: S
authors.lastname: Sitthimonchai
authors.forename: Prasat
authors.initials: P
authors.lastname: Kittakoop
authors.forename: Somsak
authors.initials: S
authors.lastname: Ruchirawat
authors.forename: Tripetch
authors.initials: T
authors.lastname: Kanchanapoom
mesh_terms: D027901:Acanthaceae / Q000737:chemistry*; D002109:Caffeic Acids / Q000737:chemistry; D047309:Flavones / Q000737:chemistry*; D005960:Glucosides / Q000737:chemistry; D006027:Glycosides / Q000737:chemistry*; D010636:Phenols
chemical_list: D002109:Caffeic Acids; D047309:Flavones; D005960:Glucosides; D006027:Glycosides; D010636:Phenols; C552409:forsythoside B; C064683:isoacteoside