2,3-dimethyl-1,4,4a,9a-tetrahydro-fluorene

spiro(7,8-diazatetracyclo(4.3.0.02,4.03,5)non-7-ene-9,1'-cyclopropane)

异喹啉

11,12-bis[(trimethylsilyl)ethynyl][4.3.2]propella-1,3,11-triene

11,12-bis[(tert-butyldimethylsilyl)ethynyl][4.3.2]propella-1,3,11-triene