1-Cyclopropyldibenzo[f,h]spiro[4.4]non-2-ene

1-(trans-2-cyclopropylvinyl)dibenzo[d,f]spiro[2.4]heptane

2-(dicyclopropylmethylidene)spiro[cyclopropane-1,9'-fluorene]

3-(9'-fluorenyl)-cyclohexene

9-(9-hydroxyfluoren-9-yl)fluoren-9-ol