nitro-malonic acid dianilide

5-methyl-3-phenyl-1,3-oxazolidine-2,4-dione

1-(4-hydroxy-9,10-dioxoanthracen-1-yl)-3-phenylurea

1-phenyl-3-(5,6,7,8-tetrahydronaphthalen-1-yl)urea

N-(4-氨基苯基)-N'-苯基-脲