1,2,7,8-tetrahydro-2a,7[1',2']:8,12b[1'',2'']-dibezenodibenzo[a,e]cyclobuta[c]cyclooctene

9-methyl-1,2,3,4,5,6,7,8-octahydroanthracene

1,2,3,4-tetrahydro-9-methylanthracene

4-phenyl-2-(4-phenylpyridin-2-yl)pyridine

10-methylidene-9H-anthracene