2,4-二甲基-1,3-戊二烯

4-chloro-2,4-dimethylpent-2-ene

3,3,5,5-四甲基柠檬烯

2,4,4,6,8-Pentamethylnona-2,5,7-triene

(E)-2,4,6,6,8-pentamethylnona-1,3,7-triene