Fig. 3. The MS/MS method to determine the formation of product and potentially glycosylation position. (a) An example to show the 3-O glycosylation – the formation of radical aglycone (283.8). (b) An example to show the glycosylation on 4′-O position – the formation of aglycone (284.9) and the presence of fragment of 179.0. (c) An example to show the 7-O glycosylation – the formation of aglycone (300.8) only.
