2,4,7,8,9-五-O-乙酰-N-乙酰神经氨酸甲酯

N-acetylneuraminic acid methyl ester

methyl 5-acetamido-2,6-anhydro-3,5-dideoxy-8,9-O-isopropylidene-4-O-(2-propynyl)-D-glycero-D-galacto-non-2-enonate