(1aR,2R,7S,7aS)-4-methyl-1a,2,7,7a-tetrahydro-1H-2,7-ethenocyclopropa[b]naphthalene-3,6-dione

8,9:10,11-Dibenzotricyclo[5.2.2.22,6]trideca-3,8,10,12-tetraen-7-carbonitril

9,10:11,12-Dibenzotricyclo[6.2.2.12,7]trideca-3,5,9,11-tetraen-1-carbonitril

9-(cyclohepta-2,4,6-trien-1-yl)-9,10-dihydroanthracene-9-carbonitrile

9,10,12,13-Tetrahydro-11H-9,10[1',2']-endo-cycloheptanthracen-9-carbonitril