methyl 2-acetamido-2-prop-2-enylpent-4-enoate

methyl 2-(diethylcarbamoyl)benzoate

2-氯-4-碘烟酸甲酯

1-氰基环己基甲酸甲酯

4-氧代四氢-2H-吡喃-3-羧酸甲酯