1-[4-(6-oxo-3-phenylpyridazin-1-yl)butyl]-3-phenylurea

1-[5-(6-oxo-3-phenylpyridazin-1-yl)pentyl]-3-phenylurea

1-(2-hydroxypropyl)-3-phenylurea

5,5-dimethyl-1,3-diphenyl-2-sulfanylideneimidazolidin-4-one

4,4-dimethyl-1,3-diphenyl-5-sulfanylideneimidazolidin-2-one