3-氨基-5,5-二(苯基)咪唑烷-2,4-二酮

(2-phenylethylideneamino)urea

4-氨基-(4H)-1,2,4-噻唑-3,5-二醇

[(4,6,7-trimethoxy-2,3-dihydro-1-benzofuran-5-yl)methylideneamino]urea

[1-(5-甲基-2-呋喃基)乙亚基氨基]脲