Three new bisdesmosidic triterpenoid saponins, helianthoside 1(1), 2(2), and 3(3), were isolated from the flowers of Helianthus annuus L. and a new monodesmoside 4 was isolated after the cleavage of the ester-glycosidic linkages of 2 and 3. The structures of the compounds were elucidated by 13C-NMR,
Two new oleanane-type triterpene glycosides, named helianthosides 4 (4) and 5 (5), along with four known triterpene glycosides, helianthosides 1 (1), 2 (2), 3 (3), and B (6), were isolated from an n-butanol-soluble fraction of a methanol extract of sunflower (Helianthus annuus) petals. The