Apolysaccharide of unknown structure was isolated, subjected to exhaustive methylation (which will modify free hydroxyls), and hydrolyzed (also see chap 8 #6). analysis of the products revealed the following three methylated sugars in the ratio 20: 1: 1. the sugars were 2,3,4-tri-o-methyl-d-glucose, 2,4-di-o-methyl-d-glucose, and 2,3,4,6-tetra-o-methyl-dglucose. what is the structure of the polysaccharide?