Crude herbal materials listed in Table 1 were purchased and
identified by a professional pharmacist from traditional Chinese
medicine (TCM) shop in YanCheng city (Jiangsu, China). The dry
herbs were ground to a fine powder using a domestic grinder,
transferred to dark glass bottles until further analysis. The method
of plant extracts were performing according to the paper (Wang and
Dai, 2012). The final extracts of 20 mg/ml dw stock solution were
obtained and stored in bottles at 4°C before analysis. The analysis
results through the paper were expressed quantified as the dry
weight (dw) of the assay solution.