New triterpenoid saponins from the stem bark of Hallea ledermannii

[Display omitted] •Twenty-three triterpenoid saponins were isolated from Hallea ledermannii.•Nine saponins including five quinovic, three cinchonic and one pyrocinchonic acid glycosides were newly described.•Sugar moieties were identified as 6-deoxy-d-allofuranose, 6-deoxy-d-allopyranose, d-glucose, d-fucose, d-quinovose, d-xylose and l-rhamnose.•This is the first report of triterpenoid saponins from Hallea ledermannii. Twenty-three triterpenoid saponins (1–23) have been isolated from the aquoeus and ethyl acetate fractions of the stem bark of Hallea ledermannii. Among them, nine (1–9) are newly described, some of them containes uncommun natural 6-deoxy-d-allofuranose, 6-deoxy-d-allopyranose, and 6-deoxy-d-pyranose as a sugar moiety. This is the first report of the isolation and structural elucidation of these compounds from H. ledermannii. The chemical structure of the compounds was determined using NMR and HRMS data.