cis-2,3-dihydroxybicyclo[2.2.2]octa-5,7-diene

4,4-dimethyl-3,5-dioxatricyclo[5.2.2.02,6]undeca-8,10-diene

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

N'-(bicyclo[2.2.1]hepta-2,5-dien-7-ylmethylene)-4-methylbenzenesulfonohydrazide