(4R,5R,6R)-4,5-Diacetoxy-6-((R)-1,2-diacetoxy-ethyl)-5,6-dihydro-4H-pyran-2-carboxylic acid methyl ester

dimethyl 4-azido-2,3-di-O-benzyl-4-deoxy-β-L-arabinopyranosyl-(1->8)-[(4,5,7,8-O-tetra-O-acetyl-3-deoxy-D-manno-oct-2-ulopyranosyl)onate-(2->7)]-(allyl 3-deoxy-α-D-manno-oct-2-ulopyranoside)onate