4-甲基苯乙烯

1-乙基-4-乙烯基苯

(E)-1-(4-methylphenyl)-1-pentene

3-propan-2-ylidenespiro[5.5]undeca-1,4-diene

2,2-dimethyldispiro[2.2.5⁶.2³]trideca-4,12-diene