methyl 3-O-benzyl-4-O-(3-O-benzyl-4-O-(3-O-benzyl-4-O-(3-O-benzyl-2,6-dideoxy-β-D-arabinohexopyranosyl)-2,6-dideoxy-β-D-arabino-hexopyranosyl)-2,6-dideoxy-β-D-arabino-hexopyranosyl)-2,6-dideoxy-α-D-arabino-hexopyranoside