1-(4-Chloro-phenyl)-2-(diethyl-hydrazono)-ethanone
2-diethylamino-4-hydroxy-6-methyl-pyrimidine
3-(2-(2,2-diethylhydrazinyl)-3,4-dioxocyclobut-1-enylamino)-2-hydroxy-N,N-dimethylbenzamide
1-Biphenyl-4-yl-2-(diethyl-hydrazono)-ethanone
4-nitro-α-oxo-benzeneacetaldehyde, aldehydo-(diethylhydrazone)