b-D-Glucopyranoside,3,4-dihydro-5-hydroxy-3-[(3,4,5-trihydroxybenzoyl)oxy]-4-(2,4,6-trihydroxyphenyl)-2-(3,4,5-trihydroxyphenyl)-2H-1-benzopyran-7-yl,2,6-bis(3,4,5-trihydroxybenzoate), [2R-(2a,3b,4a)]-