methyl [methyl (5-acetamido-7,8,9-tri-O-acetyl-3,4,5-trideoxy-β-D-manno-non-3-en-2-ulopyranosid)onate]

methyl [methyl (5-acetamido-7,8,9-tri-O-acetyl-3,4,5-trideoxy-α-D-manno-non-3-en-2-ulopyranosid)onate]