The decreased peaks were identified as quercetin-
3,40-di-O-b-D-glucoside (1) and quercetin-40-O-b-D-glucoside (2), and peaks that increased were
quercetin-3-O-b-D-glucoside (3) and quercetin (4), respectively. It was expected that 3 and 4 were originated
from the glucosidic cleavage of their glucosides, 1 and 2