Abstract
? 2022 Elsevier B.V.Three unprecedented 23-nor-3,4-seco-3-acetallupane triterpenoids, gracilistylacid A-C (1–3), along with three known lupanoids (4–6), were isolated from the aerial parts of Acanthopanax gracilistylus W.W. Smith var. gracilistylus. Compounds 1–3 may be biosynthetically formed via carboxylation, decarboxylation, cycloreversion, and aldolization reactions based on impressic acid (4). The structures of all compounds were characterized by spectroscopic techniques and X-ray craystallographyic studies. Compounds 3 and 4 exerted anti-osteosarcoma effects through an inhibition of cell migration and vasculogenic mimicry (VM) formation in 143B cells in vitro.