Preparation of tripterine-loaded nanostructured lipid carrier and its in vitro transdermal absorption Preparation of tripterine-loaded nanostructured lipid carrier and its in vitro transdermal absorption Determination of tripterine in Tripterygium wilfordii and its tablets by HPLC Preparation of self-assembled beads drug delivery system of tripterine based on cyclodextrin and oil as well as its in vitro evaluation Determination of contents of tripterine in tripterygii preparations LC-MS/MS method for determination of tripterine in plasma:pharmacokinetic study in Beagles