Iridoids from Caryopteris x clandonensis.
In continuation of our phytochemical studies on Caryopteris x clandonensis (Lamiaceae), three further iridoids were isolated from the methanolic extract of the stems. Their structures were established by 1D and 2D NMR and MS analysis as a C-6 epimer of 8-O-acetylharpagide (6-epi-8-O-acetylharpagide), a derivative of harpagide which contained the unusual feature of a 3',4' seco-glycopyranosyl moiety (clandonoside II) and a methyl cetal of 8-O-acetylharpagide aglucone hydrate named clandonensine.
Hannedouche
S
S
Laboratoire Pharmacophores Redox, Phytochimie et Radiobiologie, Faculté des Sciences Pharmaceutiques, Toulouse, France. shannedouche@hotmail.com
Stanislas
E
E
Moulis
C
C
Fourasté
I
I
D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D019686:Lamiaceae / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D015394:Molecular Structure
D006027:Glycosides