MS/MS profiling of taxoids from the needles of Taxus wallichiana

Phytochemical Analysis : PCA
K P MadhusudananS Kumar

Abstract

Ammonium cationisation has been used for taxoid profiling of partially purified methanolic extracts of needles of Taxus wallichiana growing in different regions of the Himalayas (Kashmir, Himachal Pradesh, UP Hills, Darjeeling, Sikkim and Arunachal Pradesh) by electrospray ionisation tandem mass spectrometry (MS/MS). The MS/MS spectra of the [M + NH4]+ or [M + H]+ ions gave structurally diagnostic fragment ions which revealed information about the taxane skeleton as well as the number and nature of the substituents. The rearranged 11(15-->1)-abeo-taxanes showed a characteristic elimination of the hydroxyisopropyl group with an acetoxy/benzoyloxy group from C-9. The identification of the taxoids was achieved by comparison of the MS/MS spectra with those of authentic taxoids or was based on biogenetic grounds. The results were corroborated by liquid chromatography-MS analysis. Out of the 50 taxoids identified, 21 belonged to the rearranged class. The presence of paclitaxel in the samples from four regions was confirmed: the study also revealed the occurrence of several basic taxoids in these samples. MS/MS profiling by electrospray ionisation was shown to be a fast and reliable technique for the analysis of taxoid samples.

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Citations

Nov 25, 2006·Applied Microbiology and Biotechnology·Dieter Frense
May 9, 2006·International Journal of Legal Medicine·J PietschJ Dressler
Oct 6, 2011·Chemical Reviews·Yu-Fang WangBin Cong
Mar 1, 2008·Journal of Ethnopharmacology·Muhammad NisarHumera Perveen
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Jul 12, 2002·Journal of Mass Spectrometry : JMS
Feb 10, 2018·Phytochemical Analysis : PCA·Lydia Siegle, Jörg Pietsch
Jul 13, 2006·Journal of Separation Science·Yuangang ZuGünter Schwarz
Feb 17, 2005·Rapid Communications in Mass Spectrometry : RCM·Min Ye, De-an Guo
Apr 1, 2009·Phytochemical Analysis : PCA·Emilie DuquesnoyJoseph Casanova
Apr 29, 2019·BMC Health Services Research·Lisa D HawkeJoanna Henderson
Sep 6, 2013·Magnetic Resonance in Chemistry : MRC·Mathieu PaoliJoseph Casanova

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