Antisweet Natural Products. XI. Structures of Sitakisosides VI-X from Stephanotis lutchuensis KOIDZ. var. japonica

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From the fresh stem of Stephanotis lutchuensis var. japonica, five new oleanate-type triterpenoid glycosides named sitakisosides VI-X (1-5) were isolated. Their structures were determined on the basis of spectroscopic data and chemical evidence. Sitakisosides VI and VII are 3-O-β-D-xylopyranosyl(1→6)-β-D-glucopyranosyl(1→6)-β-D-glucopyranosido-21-O-(6-N-methylanthranilyl)-β-D-glucopyranosyl and 3-O-β-D-xylopyranosyl(1→6)-β-D-glucopyranosyl(1→6)-β-D-glucopyranosido-21-O-(4-N-methylanthranilyl)-β-D-glucopyranosyl sitakisogenin, respectively. Sitakisoside VIII is 3-O-β-d-xylopyranosyl(1→6)-β-D-glucopyranosyl(1→6)-β-D-glucopyranosido-21-O-N-methylanthranilyl-3β, 16β, 21β, 28-tetrahydroxyolean-12-ene-22-one. Sitakisoside IX is 3-O-β-D-xylopyranosyl(1→6)-β-D-glucopyranosyl(1→6)-β-D-glucopyranosido-21-O-(6-N-methylanthranilyl)-β-D-glucopyranosyl gymnestrogenin. Sitakisoside X is 3-O-β-D-xylopyranosyl(1→6)-β-D-glucopyranosyl(1→6)-β-D-glucopyranosyl longispinogenin.
公益社団法人日本薬学会の論文
1994-12-15