Analysis of iridoids, secoiridoids and xanthones in Centaurium erythraea, Frasera caroliniensis and Gentiana lutea using LC-MS and RP-HPLC.
This study presents a new and validated HPLC method for the simultaneous determination of bioactive compounds in Centaurium erythraea, Frasera caroliniensis and Gentiana lutea. The iridoid loganic acid, four secoiridoids and 29 xanthones were separated on a RP-18 column, using aqueous o-phosphoric acid (0.085%, v/v) and acetonitrile as mobile phase. Phytochemical investigation of C. erythraea herb and F. caroliniensis roots resulted into isolation of 25 xanthones and three secoiridoids the structure of which was elucidated by spectroscopic means (NMR, MS and UV). 1,3,8-Trihydroxy-5,6-dimethoxyxanthone, isolated from C. erythraea, turned out to be a novel xanthone. The stability of the analytes was tested by subjecting samples to light, moisture and different temperatures. After six months of storage, decomposition of gentiopicroside and sweroside was observed. The swertiamarin content was nearly unchanged when stored at room temperature or in the refrigerator, but high temperature conditions reduced the content to 85%. In contrast, xanthones were stable under long-term, refrigerated and accelerated conditions. The established chromatographic method has been successfully applied for the quantification of the bioactive compounds in the three plants. The presence and distribution of polyoxygenated xanthones within the three members of the Gentianaceae family and their significance as analytical markers are discussed.
Institute of Pharmacy/Pharmacognosy, Center of Molecular Biosciences Innsbruck, University of Innsbruck, Innrain 52c, 6020 Innsbruck, Austria.
Anita
A
Aberham
Valerio
V
Pieri
Edward M
EM
Croom
Ernst
E
Ellmerer
Hermann
H
Stuppner
D029966:Centaurium / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D002853:Chromatography, Liquid; D030012:Gentiana / Q000737:chemistry; D029965:Gentianaceae / Q000737:chemistry*; D006801:Humans; D057888:Iridoid Glucosides / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification; D039823:Iridoids / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D013058:Mass Spectrometry; D008517:Phytotherapy; D010936:Plant Extracts / Q000032:analysis* / Q000494:pharmacology; D018517:Plant Roots / Q000737:chemistry; D011753:Pyrones / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification; D015203:Reproducibility of Results; D044004:Xanthones / Q000032:analysis* / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology
D057888:Iridoid Glucosides; D039823:Iridoids; D010936:Plant Extracts; D011753:Pyrones; D044004:Xanthones; C002947:loganic acid; C013270:swertiamarin