4-甲基-3-环己烯-1-酮

ethyl 2-cyano-2-(4-methylcyclohex-3-en-1-ylidene)acetate

ethyl 2-(4-methylcyclohex-3-en-1-yl)acrylate

双戊烯

p-menth-1,8-dien-10-oic acid