The effects of an aqueous extract of the root bark of H. trifoliata on various smooth muscle preparations were investigated. The extract had no contractile or relaxant effect on guinea pig gastrointestinal smooth muscle (n = 6), trachea (n = 4), taenia coli (n = 6), nor did it affect the
By means of activity-directed chromatographic fractionation using the 12-O-tetradecanoylphorbol acetate (TPA)-induced edema test, two saikosaponins were isolated from the MeOH extract of Heteromorpha trifoliata leaves. They were identified as 16 beta, 23-dihydroxy-13,28-epoxyolean-11-en-3