Figure 1.

HPLC chromatogram of GGS. The solution of GGS was prepared by dissolving it in pyrogen-free isotonic saline (10 mg/100 mL). The major active compound of chlorogenic acid (0.081 mg mL⁻¹) was detected at 10.77 min retention time. The injection volume was 10 μL, and the flow rate was 1.0 mL min⁻¹.