Fig. 3From: Novel phthalide derivatives identified from Ligusticum chuanxiong (Chuanxiong)Chiral HPLC analytical chromatograms of compounds 1–8. The retention times (min) for the two peaks of compounds 1–6 (95 % MeOH-H2O, 0.7 mL/min; 276 nm) and 7–8 (75 % MeOH-H2O, 0.5 mL/min; 276 nm) are marked on each chromatogram. The letters a–h successively stand for the profiles of 1–8 Back to article page