2,4,7,8,9-Penta-O-acetyl-N-acetylneuraminic Acid Methyl Ester,73208-82-9,Methyl 5-Acetamido-2,4,7,8,9-Penta-O-Acetyl-3,5-Dideoxy-D-Glycero-D-Galacto-2-Nonulopyranosylonate N-Acetylneuraminic Acid Methyl Ester 2,4,7,8,9-Pentaacetate; 5-(Acetylamino)-3,5-Dideoxy-D-Glycero-D-Galacto-2-Nonulopyranosonic Acid Methyl Ester 2,4,7,8,9-Pentaacetate; N-Acetylneuraminic Acid Methyl Ester 2,4,7,8,9-Pentaacetate,N-乙酰基面神经氨酸甲酯 2,4,7,8,9-五乙酸酯