allyl (2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl)-(1 -> 2)-3,4-O-isopropylidene-α-D-fucopyranoside

allyl (2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl)-(1 -> 2)-4-O-acetyl-α-D-fucopyranoside