(4-methylpentan-2-ylideneamino)urea

[(3-methoxy-4-oxocyclohexa-2,5-dien-1-ylidene)methylamino]urea

[(1,1,1,3,3,3-hexafluoro-2-hydroxypropan-2-yl)amino]urea

[(4-heptoxyphenyl)methylideneamino]urea

carbamoyl azide