Study on quality control of Yupingfeng Dropping Pills Determination of ferulic acid and deoxyschisandrin in Compound Ziziphi Spinosae Semen Soft Capsule by HPLC Simultaneous quantification of nine constituents in Ziziphi Spinosae Semenby HPLC-MS Optimized compatibility of sedative-hypnotic components in Ziziphi Spinosae Semen by uniform design A new flavone C-glycoside from Ziziphi Spinosae Semen Comparison on quality of wild Ziziphi Spinosae Semen between marketed and produced in Tianjin