Bioactive 3,4-seco-Triterpenoids from the Fruits of Acanthopanax sessiliflorus.

Eight new 3,4-seco-lupane triterpenes and glycosides, acanthosessiligenins I and II (1, 3) and acanthosessiliosides A-F (2, 4-8), as well as six known 3,4-seco-lupane triterpenes (9-14) were isolated from an ethanolic extract of Acanthopanax sessiliflorus fruits. The chemical structures of 1-8 were determined by spectroscopic data interpretation. All isolated compounds were tested for their cytotoxicity against six human cancer cell lines and their ability to inhibit LPS-induced nitric oxide production in RAW 264.7 macrophages.