methyl (E)-2-acetamido-3-acetylsulfanylprop-2-enoate

methyl 6-chloro-5-formylpyridine-2-carboxylate

甲基N-乙酰基-4-氟苯丙氨酸酯

2-acetamidoprop-2-enamide

methyl 2-acetamidoheptanoate