Saponin, iridoid, phenylethanoid and monoterpene glycosides from Verbascum pterocalycinum var. mutense


Tatli İ. İ. , Akdemir Z., Bedir E., Khan I.

Turkish Journal of Chemistry, vol.28, no.1, pp.111-122, 2004 (Journal Indexed in SCI Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 28 Issue: 1
  • Publication Date: 2004
  • Title of Journal : Turkish Journal of Chemistry
  • Page Numbers: pp.111-122

Abstract

Ilwensisaponin C (= 3-O-{[α-L-rhamnosyl-(1→4)-(β-D- glucopyranosyl-(1→3)]-β-D-glucopyranosyl]-(1→2) -β-D-fucopyranosyl}-11-methoxy-olean-12-ene-3β, 23, 28-triol) (1), ilwensisaponin A (= mimengoside A = 3-O-{[αL-rhamnosyl-(1→4)-(β- D-glucopyranosyl-(1→3)]-β-D-glucopyranosyl]-(1→2)-β-D-fucop- yranosyl}-13β, 28-epoxyolean-11-ene-3β, 23-diol) (2), ajugol (3), picroside IV (= 6′-O-trans-p-hydroxycin- namoylcatalpol) (4), verbascoside {= acteoside, [β-(3,4-dihydroxyphenyl)-ethyl]-(3′-O- α-L-rhamnopyra- nosyl)-(4′-O-caffeoyl)-β-D-glucopyranoside} (5) and 1-(β-D-glucopyranosyl)-8-hydroxy-3, 7-dimethyl-oct-2(E), 6(E)- dienoate (6) were isolated from the flowers of Verbascum pterocalycinum var. mutense Hub.-Mor. The structures of the compounds were determined primarily from 1D and 2D NMR experiments. This is the first phytochemical study performed on V. pterocalycinum var. mutense and the first report of the presence of 1-(β-D-glucopyranosyl)-8-hydroxy-3, 7-dimethyl-oct-2(E), 6(E)- dienoate (5) as a monoterpene glycoside along with picroside IV (= 6′-O-trans-p- hydroxycinnamoylcatalpol) (4) from the genus Verbascum.