Ouyang Ming'an

    ( Department ofChemistry, Huaqiao University, Quanzhou, Fujian 362011 )

    Yang Chongren

    ( Kunming Institute ofBotany, Chinese Academy of Sciences, Kunming )

    Wang Hanqing

    ( Lanzhou Institute ofChemical Physics, Chinese Academy of Sciences, Lanzhou )

Abstract Six new oleanane-type saponins,arilloside A-F ( Ⅰ～Ⅵ ), along with a known saponin, polygalasaponin ⅩⅩⅩⅤ ( Ⅶ ), were isolated from the root of Polygala arillataBuch.-Ham.. The structures of these new compounds were elucidated as 3-O- β -D-glucopyranosyl presenegenin28-O- β -D-xylopyranosyl(1 → 4)- α -L-rhamnopyranosyl (1 → 2)-(3, 4-di-O-acetyl)- β -D-fucopyranoside( Ⅰ ); 3-O- β -D-glucopyranosyl presenegenin 28-O- β -D-xylopyranosyl (1 → 3)- β -D-xylopyranosyl (1 → 4)- α -L-rhamnopyranosyl (1 → 2)- β -D-fucopyranoside( Ⅱ ); 3-O- β -D-glucopyranosyl presenegenin 28-O- β -D-xylopyranosyl (1 → 3)- β -D-xylopyranosyl (1 → 4)- α -L-rhamnopyranosyl (1 → 2)-(3,4-di-O-acetyl)- β -D-fucopyranoside( Ⅲ ); 3-O- β -D-glucopyranosyl presenegenin 28-O- β -D-xylopyranosyl (1 → 3)- [β -D-galactopyranosyl (1 → 4) ] - β -D- β -D-xylopyranosyl (1 → 4)- α -L-rhamnopyranosyl (1 → 2)- β -D-fucopyranoside( Ⅳ ); 3-O- β -D-glucopyranosyl presenegenin 28-O- β -D-xylopyranosyl (1 → 3)- [β -D-galactopyranosyl (1 → 4) ] - β -D-xylopyranosyl (1 → 4)- α -L-rhamnopyranosyl (1 → 2)-(3-O-acetyl)- β -D-fucopyranoside( Ⅴ ) and 3-O- β -D-glucopyranosyl presenegenin 28-O- β -D-xylopyranosyl (1 → 3)- [β -D-galactopyranosyl (1 → 4) ] - β -D-xylopyranosyl (1 → 4)- α -L-rhamnopyranosyl (1 → 2)-(3,4-di-O-acetyl)- β -D-fucopyranoside( Ⅵ ) on the basis of spectroscopic and chemical methods.

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