methyl 2,3,6-tri-O-benzyl-4-O-(2,3-di-O-methyl-5-C-vinyl-β-D-glucopyranosyl)-α-D-glucopyranoside

methyl 2,3,6-tri-O-benzyl-4-O-(benzyl 2,3-di-O-methyl-5-C-methoxymethyl-α-L-idopyranosyluronate)-α-D-glucopyranoside