(3-甲基丁-2-烯基)丙二酸二乙酯

diethyl 2-(2-methylbut-3-en-2-yl)propanedioate

methyl 2-(benzenesulfonyl)-3,3-dimethylpent-4-enoate

methyl 5-methyl-2-(phenylsulfonyl)hex-4-enoate

2-methyloct-2-en-4-ol