2-C-(2,3,4,6-tetra-O-benzyl-β-D-glucopyranosyl)-7-mesyloxy-6-trimethoxy-1,3-diallylxanthene

4-C-(2,3,4,6-tetra-O-benzyl-β-D-glucopyranosyl)-7-mesyloxy-1,3-diallyloxy-6-methoxyxanthene