A Fragmentation Study on Four Oligostilbenes by Electrospray Tandem Mass Spectrometry

摘要

Oligostilbenes have attracted much interest due to their intricate structures and diverse bioactivities.In this study,two stilbene dimers,(−)-7,8-cis-ε-viniferin(1)and carasiphenol A(2),and two trimers,suffruticosol A(3)and suffruticosol C(4),were investigated by electrospray ionization ion-trap time-of-flight multistage mass spectrometry(ESI-IT-TOF-MS^(n)).Based on the MS^(n) study,the fragmentation pathways and diagnostic ions of four oligostilbenes in both positive and negative modes were proposed.The consecutive elimination of phenol(C_(6)H_(6)O)and resorcinol(C_(6)H_(6)O_(2))moieties were the particular dissociation for oligostilbenes due to the presence of 1,2-diphenylethylene nucleus.The present MS^(n) fragmentation study will provide valuable information for the fast characterization of oligostilbenes from complicated natural mixtures.