Fig. 3

Comparation of HPLC chromatograms of Danmu preparations and its excipients. a–f Represented HPLC chromatograms of Danmu Syrup, Danmu Capsule, ethyl 4-hydroxybenzoate, sodium benzoate, sucrose and dextrin, respectively. (i) Sodium benzoate (ii) ethyl 4-hydroxybenzoate, (12) strictosamide