Research progress on in vivo pharmacokinetics of triptolide and celastrol Effect of celastrol in inhibiting metastasis of lung cancer cells by influencing Akt signaling pathway and expressing integrins SEPARATION, IDENTIFICATION AND QUANTITATIVE DETERMINATION OF CELASTROL FROM THE ROOT BARK OF CELASTRUS HOOKERI EFFECTS OF ENVIRONMENTAL STRESSES ON CELASTROL CONTENTS IN TRIPTERYGIUM WILFORDII