D-GLUCOPYRANOSIDURONIC ACID(3?16R)-28-[[2-O-[(2E)-3-[4-(DGLUCOPYRANOSYLOXY)- 3-METHOXYPHENYL]-1-OXO- 2-ALLYL]-D-XYLOPYRANOSYL]OXY]-16- HYDROXY-28-OXOOLEAN-12-EN-3-YL