(5R)-5β-Ethenyl-5,6-dihydro-6α-(2-O,3-O,4-O,6-O-tetraacetyl-β-D-glucopyranosyloxy)-1H,3H-pyrano[3,4-c]pyran-1-one

(5R-trans)-5,6-dihydro-6-[(2,3,4,6-tetra-O-acetyl-beta-D-glucopyranosyl)oxy]-5-vinyl-1H,3H-pyrano[3,4-c]pyran-1-one