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BY-NC-ND 3.0 license Open Access Published by De Gruyter June 2, 2014

Two Xanthones from Polygala paniculata and Confirmation of the 1-Hydroxy- 2,3,5-trimethoxy-xanthone at Trace Level by HRGC-MS

  • Rodrigo Cristiano , Moacir G. Pizzolatti EMAIL logo , Franco Delle Monache , Claudia M. Rezende and Alexsandro Branco


Polygala paniculata L. yielded the xanthones 1-hydroxy-5-methoxy-2,3-methylenedioxyxanthone (1) and 1,5-dihydroxy-2,3-dimethoxyxanthone (2), together with coumarin murragatin and flavonol rutin. Their structures were established by chemical and spectroscopic methods (EIMS, IR, 1H and 13C NMR, NOE difference spectroscopy). By posterior analysis of an apolar crude extract using high resolution gas chromatography coupled to mass spectrometry (HRGC-MS) it was possible to characterize two sterol (spinasterol and Δ25-spinasterol) and the minor 1-hydroxy-2,3,5-trimethoxyxanthone (3). Thus, the xanthone 3 was confirmed through of co-injection HRGC-MS of the respective extract with a certified standard obtained by methylation of 2 with diazomethane.

Received: 2002-12-30
Revised: 2003-3-1
Published Online: 2014-6-2
Published in Print: 2003-8-1

© 1946 – 2014: Verlag der Zeitschrift für Naturforschung

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