7,9-dioxatrispiro[5.1.1.510.18.16]heptadeca-1,4,11,14-tetraene-3,13-dione

1-methyl-3,5-dimethylidenecyclohexene

1,3-二甲基-5-(2-甲基-2-丙烯-1-基)苯

(E)-1-(2-butenyl)-3,5-dimethylbenzene

2-methyl-4,5,7-trimethylenecyclooctene