title: Physocalycoside, a new phenylethanoid glycoside from Phlomis physocalyx Hub.-Mor.
abstract: A new phenylethanoid tetraglycoside, physocalycoside (2), was isolated from the aerial parts of Phlomis physocalyx. Its structure was identified as 3-hydroxy-4-methoxy-beta-phenylethoxy-O-[alpha-L-rhamnopyranosyl-(1-->2)-alpha-L-rhamnopyranosyl-(1-->3)]-4-O-feruloyl-[beta-D-glucopyranosyl-(1-->6)]-beta-D-glucopyranoside, on the basis of spectroscopic evidence. In addition, one known iridoid glucoside, lamiide (1) and five known phenylethanoid glycosides, wiedemannioside C (3), verbascoside (= acteoside) (4), leucosceptoside A (5), martynoside (6), and forsythoside B (7) were also characterized. Compounds 2-7 demonstrated radical scavenging properties towards the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical.
authors.affiliation: Department of Pharmacognosy, Faculty of Pharmacy, Hacettepe University TR 06100, Ankara, Turkey. tersoz@hacettepe.edu.tr
authors.forename: Tayfun
authors.initials: T
authors.lastname: Ersöz
authors.forename: Kalina Iv
authors.initials: KI
authors.lastname: Alipieva
authors.forename: Funda Nuray
authors.initials: FN
authors.lastname: Yalçin
authors.forename: Pinar
authors.initials: P
authors.lastname: Akbay
authors.forename: Nedjalka
authors.initials: N
authors.lastname: Handjieva
authors.forename: Ali A
authors.initials: AA
authors.lastname: Dönmez
authors.forename: Simeon
authors.initials: S
authors.lastname: Popov
authors.forename: Ihsan
authors.initials: I
authors.lastname: Caliş
mesh_terms: D002240:Carbohydrate Sequence; D002934:Cinnamates / Q000737:chemistry* / Q000302:isolation & purification; D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification; D019686:Lamiaceae / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D008969:Molecular Sequence Data; D009844:Oligosaccharides / Q000737:chemistry* / Q000302:isolation & purification; D010626:Phenylethyl Alcohol / Q000737:chemistry / Q000302:isolation & purification; D035261:Plant Components, Aerial / Q000737:chemistry*; D014312:Trisaccharides / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D002934:Cinnamates; D006027:Glycosides; D009844:Oligosaccharides; D014312:Trisaccharides; C478003:physocalycoside; D010626:Phenylethyl Alcohol