Determination of equilibrium solubility and apparent oil/ water partition coefficient of schizonepetin Determination of equilibrium solubility and n-octanol/water partition coefficient of pulchinenosiden D by HPLC tudy on physicochemical properties and influence factors on stability of breviscapine Equilibrium solubility of ginkgo flavonoid components in water and PBS of different pHs with mass fraction weight coefficient method Study on solubility of ginkgolide components with mass fraction weight coefficient method Investigation on equilibrium solubility and apparent oil/water partition coefficient of diterpenoid tanshinone component by similarity analysis methods