To identify the chemical components of the extract, two HPLC analytical systems were performed on Agilent Technologies 1200 (AG1100 Autosampler, USA) equipped with isocratic pumping system, four channel in-line vacuum degasser, an autosampler injector and using a C18 column (5 µm, 4.6 x 250 mm). For the phenolic analysis condition, the gradient mobile phase consisted of solution A (acetonitrile: H2O: phosphoric acid = 79.7:20:0.3) and solution B (0.3% phosphoric acid) at a flow rate of 0.8 ml/min. A concave gradient was applied to the ratio of solution A: solution B from 5:95 to 50:50 in 45 min (the gradient of mobile phase as showed in Table 3). A UV-vis detector at wavelength of 210 nm was used. The temperature of analytical room and analysis column was maintained at 25°C. For the hydroxysafflor yellow A (HSYA) analysis system, mobile phase was an isocratic phase of 10% aqueous acetonitrile at a flow rate of 0.8 ml/min and detection at 403 nm.