1,1'-Bis(4-formylphenyl)-[4,4'-bipyridine]-1,1'-diium chloride
1,1'-Bis(4-formylphenyl)-[4,4'-bipyridine]-1,1'-diium bromide
2,2'-((2,5-diformyl-1,4-phenylene)bis(oxy))bis(N,N,N-trimethylethan-1-aminium) bromide
3,3'-((2,5-diformyl-1,4-phenylene)bis(oxy))bis(propane-1-sulfonic acid)
4,4'-(3,8-Bis((4-aminophenyl)ethynyl)pyrene-1,6-diyl)dibenzaldehyde