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Studies on the constituents of Aster tataricus L.f.II. Structures of aster saponins isolated from the root.

1989; Pharmaceutical Society of Japan; Volume: 37; Issue: 8 Linguagem: Inglês

10.1248/cpb.37.1977

1347-5223

Tsuneatsu Nagao, Shizuko HACHIYAMA, Hikaru Okabe, Tatsuo YAMAUCHI,

Phytochemistry and Biological Activities

Four new oleanane-type triterpene saponins named aster saponins A, B, C and D were isolated from the root of Aster tataricus L.f. (Compositae). Their structures were elucidated based on chemical and spectral evidence as follows.Aster saponin A : a 28-[O-β-D-xylopyranosyl-(1→3)-O-α-L-arabinopyranosyl-(1→4)-[O-β-D-apiofuranosyl-(1→3)]-O-α-L-rhamnopyranosyl-(1→2)-β-D-xylopyranosyl]ester of 3-O-[O-α-L-arabinopyranosyl-(1→6)-β-D-glucopyranosyl]-2β, 3β, 16α-trihydroxyolean-12-en-28-oic acid (asterogenic acid).Aster saponin B : an echinocystic acid (3β, 16α-dihydroxyolean-12-en-28-oic acid) glycoside corresponding to aster saponin A.Aster saponin C : a 28-[O-β-D-xylopyranosyl-(1→3)-O-α-L-arabinopyranosyl-(1→4)-[O-β-D-apiofuranosyl-(1→3)]-O-α-L-rhamnopyranosyl-(1→2)-[O-α-L-rhamnopyranosyl-(1→3)]-β-D-xylopyranosil]ester of 3-O-[O-α-L-arabinopyranosyl-(1→6)-β-D-glucopyranosyl]asterogenic acid.Aster saponin D : an echinocystic acid glycoside corresponding to aster saponin C.