Peak 15 (Rt 57.7 min) had a [MH] at m/z 477 which gave a
MS2 ion at m/z 314 with a loss of 162 amu, corresponded to a
methoxy-flavonol-3-O-glucoside structure. Based on the product
ion mass spectrum and in keeping with the findings of Sriseadka
et al. (2012) this peak was tentatively identified as isohamnetin-
3-O-glucoside (10). This identification was confirmed by cochromatography
with a reference compound.