Bicycloheptyl-3,5,7,3',5',7'-hexaene-3,3'-dicarbaldehyde

1,6-diiodo-1,3,5-cycloheptatriene

Cycloheptatrien-dicarbonsaeure-(1.6)-monomethylester

6-Iodcycloheptatrien-1-carbonitril

6-Chloro-cyclohepta-1,3,5-trienecarboxylic acid methyl ester