POLYGALASAPONINS XLII-XLVI FROM ROOTS OF POLYGALA-GLOMERATA

Five new oleanane-type saponins, polygalasaponins XLII-XLVI, along wit h two known saponins were isolated from the roots of Polygala glomerat a Lour. The structures of polygalasaponins XLII-XLVI were elucidated a s 3-O-beta-D-glucopyranosyl presenegenin [(E)-3,4-dimethoxycinnamoyl]} -beta-D-fucopyranosyl ester, 3-O-beta-D-glucopyranosyl presenegenin -[ 4-O-(E)-p-methoxycinnamoyl]-beta-D-fucopyranosyl ester, 3-O-beta-D-glu copyranosyl presenegenin [(E)-3,4-dimethoxycinnamoyl]}-beta-D-fucopyra nosyl ester, 3-O-beta-D-glucopyranosyl presenegenin [(E)-3,4-dimethoxy cinnamoyl]}-beta-D-fucopyranosyl ester, 3-O-beta-D-glucopyranosyl pres enegenin [(Z)-3,4-dimethoxycinnamoyl]}-beta-D-fucopyranosyl ester, res pectively, on the basis of spectroscopic and chemical evidence. (C) 19 97 Elsevier Science Ltd. All rights reserved.