4-oxo-3,4-dihydrobenzofuro<3,2-d>pyrimidine
3-N-(p-chlorophenyl)-3,4-dihydro-4-oxo-benzofuro<3,2-d>pyrimidine
3-N-(p-methoxyphenyl)-3,4-dihydro-4-oxo-benzofuro<3,2-d>pyrimidine
ethyl 3-phenylureido-2-benzofuran carboxylate
2-ethoxycarbonyl-3-p-toluenesulfonylamidobenzofuran