[[(4Z)-5-amino-6-(7-amino-6-methoxy-5,8-dioxoquinolin-2-yl)-4-(4,5-dimethoxy-6-oxocyclohexa-2,4-dien-1-ylidene)-3-methyl-1H-pyridine-2-carbonyl]amino]urea

[(4-chlorophenyl)methylideneamino]urea

(but-2-enylideneamino)urea

[(Z)-1-(furan-2-yl)butylideneamino]urea

[3-(carbamoylhydrazinylidene)butan-2-ylideneamino]urea