Fig. 2
Overlay chromatograms of the 30 Leonuri Herba samples and the similarity of each chromatogram to their simulated mean chromatogram in blue. 1: salicylic acid; 2: leonurine; 3: rutin; 4: hyperoside; 5: quercetin; 6: Kaempferol; 7: apigenin; 8: 4',5-dihydroxy-7-methoxyflavone