The development of HPLC-PDA−ESI(−)-MSn/HRMS greatly facilitates the identification of unknown compounds
according to their molecular mass; this analytical technique further allows calculation and deduction of the element
composition of relevant chemical compounds. Several flavonol derivatives were identified in this research, 70% of which were confirmed as kaempferol derivatives, 20% of which were isorhamnetin derivatives, and 10% of which were quercetin derivatives