3-phenoxycyclobutane-1,1,2,2-tetracarbonitrile

dimethyl (E)-2,3-dicyanobut-2-enedioate

methyl tricyanoethylenecarboxylate

7-methyl-3a,6-dihydro-1H-indene-4,4,5,5-tetracarbonitrile

prop-1-ene-1,1,2,3,3-pentacarbonitrile,pyridine