Abstract: A diterpenoid trisaccharide, smithoside A, and a saponin, smithoside B, as well as six known compounds, apigenin, apigenin-7-O-glucoside, daucosterol, shanzhiside methyl ester, 8-acetylshanzhiside methyl ester and acteoside, were isolated from Aster smithianus. On the basis of spectral evidence and chemical analytical results, smithosides A and B were identified as pimar-15(16)-β-ene-8β,11α-diol-3β-O-β-D-glucopyranosyl(1^→3)-[β-glucopyranosyl(1^→2)]-β-D-glucopyranoside and 2β,3β,16β,21β,23-pentahydroxy-12-ene-28 oleanoic acid lactone-3-O-β-D-glucopyranosyl(1^→3)-β-D-glucopyranoside, respectively.

Key words: Aster smithianus, Pimarene-type diterpenoid glucoside, Triterpenoid glucoside, Oleanolic acid lactone