ethyl 4-cyclohexylidenebut-2-enoate

ethyl 2-ethenyl-5-phenylpent-4-enoate

三乙基4-膦酰巴豆酸酯

ethyl 2-ethenyl-3-hydroxy-3,4,4-trimethylpentanoate

ethyl 5-hydroxy-5,6,6-trimethylhept-2-enoate