Effect of tann in from Cornus off icinalis on immune function of adjuvant arthritis rats The Structure of Triptodihydroxy Acid Methyl Ester and wilfortrine Chemical constituents of Alisma orientalis and their immunosuppressive function Diterpenoids possessed immunosuppressive activity from Tripterygium hypoglaucum Immunosuppressive triterpenes from Tetraena mongolica Chemical constituents from stems of Hedyotis hedyotidea and their immunosuppressive activity Studies on the Sesquiterpene Alkaloids of Tripterygium wilfordii Hook.