3,3,5-三甲基-2,4-二氢吡唑

(2,2-dimethyl-1,3-dioxolan-4-yl)methyl dodecanoate

1,5-二苯基-1-戊酮

2,4-庚二烯-6-酮

undeca-2,4,7,9-tetraen-6-one