HPLC fingerprint analysis on Wei Medicine Ziziphora tenuior and Ziziphora clinopodioides Quantitative analysis of pulegone in Herba Schizonepetae HSGC fingerprint of volatile oil in Schizonepetae Spica Simultaneous determination of 10 constituents in Boyun Tuiyi Pill by HPLC HSGC fingerprint of volatile oil in Schizonepetae Spica Scientific connotation of decocting method “taking when fragrance volatilized fiercely” for Yinqiao Powder based on dynamic changes of volatile components during decocting process