Additionally, in mass spectrometry, C-glycosyl flavones
undergo cross-ring cleavages of sugar residues yielding main signals
(ions produced by losses of 60, 90 and 120 amu) that allowed
differentiation with O-glycosyl flavones (losses of 162 amu for hexose,
146 amu for rhamnose and 132 amu for pentose moieties,
respectively)