甲基庚烯酮

ethyl 2-(5-methylhex-4-enoyl)-14-oxopentadecanoate

3-ethyl-7-methylocta-2,6-dien-1-ol

3-甲基-2-(3-甲基-2-丁烯-1-基)-2-环戊烯-1-酮

diethyl 2-(5-methylhex-4-enoyl)heptanedioate