Recent Applications of Mass Spectrometry in the Study of Grape and Wine Polyphenols
Figure 9
Positive-ion mode fragmentation pathways of B-type trimer 883: retro-Diels-Alder fission (RDA), heterocyclic ring fission (HRF), benzofuran forming fission (BFF), quinone methide fission (QM), and loss of water molecule. : the ion derived from the QM fission of ring-C/ring-D linkage bond by the loss of upper unit and : the ion derived from the QM fission of ring-F/ring-G linkage bond by the loss of lower unit [41].
