1-phenyl-3-tritylurea

1,3,6,9-tetraphenyl-1,3,6,9-tetrazaspiro[4.4]nonane-2,4-dione

1-[(4-methylphenyl)sulfonylamino]-3-phenylurea

1-(benzhydrylideneamino)-3-phenylurea

4-imino-1-(4-methoxyphenyl)-3-phenyl-5-sulfanylideneimidazolidin-2-one