5-(3,4-Dimethoxyphenyl)-1,3,4-oxadiazol-2-amine

[(4-ethylfuro[3,2-b]indol-2-yl)methylideneamino]urea

[[(3,4-diphenyl-1,2-oxazol-5-yl)-phenylmethylidene]amino]urea

4-ethyl-3,5-diphenyl-1H-pyrazole

[(5-nitrothiophen-2-yl)methylideneamino]urea