In vivo gastrointestinal absorption kinetics of schizonepetin in rats Study on transport characteristics of honokiol in Caco-2 cell model by HPLC In vivo absorptive dynamics of arctiin in intestine of rats Transport mechanism of swertiamain metabolite across Caco-2 model Transport characteristics of ligustrazine across Caco-2 cell monolayer model and its effect on P-glycoprotein expression