2-[4-[2-[(4-nitrophenyl)methylidene]hydrazinyl]phenyl]ethene-1,1,2-tricarbonitrile

1-(2-oxocyclopentyl)ethane-1,1,2,2-tetracarbonitrile

4-indol-1-yl-4-methoxybutane-1,1,2,2-tetracarbonitrile

4-ethoxy-4-indol-1-ylbutane-1,1,2,2-tetracarbonitrile

2-(1,2,3,4-tetrahydroquinolin-6-yl)ethene-1,1,2-tricarbonitrile