: (1S,2R)-1-((2R,3R,4S,6S)-3-Acetamido-4-acetoxy-6-hydroxy-6-(methoxycarbonyl)tetrahydro-2H-pyran-2-yl)propane-1,2,3-triyl triacetate, Methyl 5-Acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-D-glycero-D-galacto-2-nonulopyranosonate, Methyl 4,7,8,9-tetra-O-acetyl-N-acetylneuraminate, N-Acetylneuraminic acid methyl ester 4,7,8,9-tetraacetate