Determination of tripterine in Tripterygium wilfordii and its tablets by HPLC Advances in studies on immunosuppression of Tripterygium wilfordii Insecticidal and Antifungal Activity of Tripterygium wilfordii Cultures Analysis of Differentially Expressed Genes in the Suspension Cell Culture of Tripterygium wilfordii Hook.f.with Elictor MeJA