Variation in Flavonoid Composition and Radical-Scavenging Activity in Ginkgo biloba L. due to the Growth Location and Time of Harvest

Figure 1

Combined chromatograms of Ginkgo biloba leaf extracts: chromatographic elution (a) and postcolumn reaction with ABTS (b) reagent. The numbers refer to the following identified compounds: () quercetin, () kaempferol, and () isorhamnetin.