1-methoxy-4-(2-methylbut-3-en-2-yl)benzene

ethyl 2-cyano-5-methylhex-4-enoate

ethyl 2-cyano-3,3-dimethylpent-4-enoate

3-ethyl-4,4-dimethylhex-5-en-3-ol

2-甲基-2-庚烯