7-methyl-5-oxo-2,3-dihydro-[1,3]oxazolo[3,2-a]pyridine-6-carbonitrile

ethyl 4-[tert-butyl-[7-(N-tert-butyl-4-ethoxycarbonylanilino)-4-cyano-4-ethoxycarbonyl-7-iminoheptanimidoyl]amino]benzoate

ethyl 5-tert-butylimino-2-[3-tert-butylimino-3-(2,6-dichloroanilino)propyl]-2-cyano-5-(2,6-dichloroanilino)pentanoate

ethyl 5-tert-butylimino-2-[3-tert-butylimino-3-(2-cyanoanilino)propyl]-2-cyano-5-(2-cyanoanilino)pentanoate

ethyl (Z)-3-chloro-2-cyano-4,4,4-trifluorobut-2-enoate