N'-benzylidene-2-oxo-N,5-diphenyl-1,3,4-oxadiazole-3(2H)-carbohydrazide

4-benzamido-1-phenyl-1,2,4-triazolidine-3,5-dione

5-ethoxy-2-phenyl-1,2-dihydro-[1,2,4]triazol-3-one

Diethyl Urea-1,3-dicarboxylate

尿素