5-(bicyclo[2.2.1]hept-2'-en-7'-ylidene)-2,2-dimethyl-1,3-dioxan-4,6-dione

cis-1,3-hexadien-5-yne

1,3-己二烯-5-炔.

苯基乙烯醚

Bicyclo[2.2.2]oct-7-en-2,5-dion-bis(tosylhydrazon)