Abstract
A novel baccharane-type triterpenoid glycoside named fatsioside A (1), together with ten oleanane glycosides, were isolated from the fruits of Fatsia japonica. The structure of fatsioside A was assigned as 3β,15α,18α-trihydroxy-18,19-secolupane-12,19-dione 3-O-β-D-glucopyranosyl-(1 → 2)-β-D-glucopyranoside by extensive NMR and HRESIMS analyses. F. japonica is the third baccharane glycoside-containing species reported to date in the plant kingdom, while fatsioside A represents the first baccharane glycoside found in the Araliaceae family. Fatsioside A inhibited the growth of rat glioma C6 cells and human glioma U251 cells with IC50 values of 33.48 ± 2.01 µM and 77.58 ± 6.19 µM, respectively. Further investigation indicated that fatsioside A induced apoptosis and necrosis in glioma cells, and arrested the cell cycle at the G0/G1 phase.
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