Figure 1.

High-performance liquid chromatography chromatograms of the assayed Bupleurum species after solid-phase extraction: (a) B. baldense (a1 – the same chromatogram from 20 to 60 min); (b) B. flavum (b1 – the same chromatogram from 20 to 60 min) and (c) B. affine. Key to peaks identities: 1 – Rutin; 2 – Isoquercitrin; 3 – Narcissin; 4 – Astragalin; 5 – Isorhamnetin 3-glucoside; 6 – Luteolin; 7 – Quercetin; 8 – Kaempferol; 9 – Isorhamnetin; 10 – Kaempferid (for chromatographic protocol see Chromatographic equipment and conditions)