立方烷

dimethyl ester of tricyclo[4.2.2.02,5]deca-3,7,9-triene-9,10-dicarboxylic acid

3,4-diazatricyclo[3.1.0.02,6]hex-3-ene

3,4-dichlorocyclobut-1-ene

all-trans 1,2,3,4-tetrabromocyclobutane