ethyl 3-methyl-5-oxo-5-phenylpent-2-enoate

3,7-dimethylocta-2,4,6-trienenitrile

3-氨基-3-甲基丁酸乙酯

ethyl 2,2-dinitroacetate

2-溴-3-甲基-2-丁酸乙酯