Figure 4.
Spectra resulting in the identification of the MS features (21.94, 772.26) and (22.17, 771.28) as a convicine and a vicine linked by decenedioic acid and two vicines linked by decenedioic acid, respectively. Spectra (A,B) show the total fragmentation spectrum, while spectra (C–E) show details of these spectra.
