乙酸酐

N-乙酰基-2-氯-2-脱氧神经氨酸甲酯4,7,8,9-四乙酸酯

methyl 5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-D-glycero-β-D-galacto-non-2-ulopyranosyl chloride