STUDY OF SINAPINYL BUT-3-ENYLGLUCOSINOLATE (BOREAVAN-A) AND RELATED-COMPOUNDS BY MASS-SPECTROMETRY

Electron impact (EI), positive and negative ion fast atom bombardment (FAB) combined with tandem mass spectrometry was used for the structur al elucidation of sinapinyl but-3-enylglucosinoiate (boreavan A), The EI mass spectra showed the presence of ions due to the sinapic acid mo iety, Protonated and deprotonated quasimolecules and some structurally significant fragment ions due to sulphate were observed in the FAB ma ss spectra, The tandem mass spectra gave information for the identific ation of the main building blocks and the sequence ions of the sinapin ium cation in boreavan A, and also showed that the number of side chai ns present in the glucosinolate moiety has a potential influence on th e location of the anion part of boreavan A. (C) 1997 John Wiley & Sons , Ltd.