3-(2-乙基-2,2-二甲基肼)丙酸乙酯碘化物

ethyl 2-ethyl-3-oxopentanoate

ethyl 6-amino-6-oxohexanoate

PER-O-ACETYL-α-THIOETHYL-N-ACETYLNEURAMINIC METHYL ESTER

methyl 2-(ethylsulfanyl)-5-acetamido-4,7,8,9-tetra-O-acetyl-2,3,5-trideoxy-2-thio-D-glycero-α-D-galacto-2-nonulopyranosonate