The structures of four triterpenoid saponins isolated from the seed of Trifolium incarnatum

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Abstract
A novel bisdesmosidic saponin, 3-0-[α-L-rhamnopyranosyl(1 - 2)-β-D-galactopyranosyl (1-2)-β-D-glucuronopyranosyl]-22-O-[β-D-glucopyranosyl(1-2)-β-D-glucopyranosyl] ole­an-l2-ene-24-ol has been isolated from the seed of the clover, Trifolium incarnatum. The structure of this and of three other structurally related saponins, 3-0-(β-D-glucuronopyra-nosyl)olean-l2-ene-22, 24-diol, soyasaponin I and soyasaponin III have been assigned on the basis of spectral and chemical evidence.

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