(4S,5R,6R)-4-azido-5-tert-butoxycarbonyl-amino-6-(1R,2R,3-trihydroxy-propyl)-5,6-dihydro-4H-pyran-2-carboxylic acid

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]