Simultaneous determination of ferulic acid and ligustrazine hydrochloride in Yangxue Injection by HPLC Simultaneous determination of ferulic acid and ligustrazine hydrochloride in Yangxue Injection by HPLC Uniform design method for optimizing proportion of transdermal penetration enhancers of ligustrazine hydrochloride Simultaneous determination of seven effective constituents from Shuxiong prescription by RP-HPLC UPLC-Q-TOF-MS analysis on constituents of Tianshu Capsule absorbed into plasma Simultaneous determination on absolute bioavailability of preparation of Chuanxiong Radix components in rats by method of AUAWC and HPLC