ethyl N-methyl-N-(methyldiazenyl)carbamate

1,3-bis(2-bromo-4-methylphenyl)urea

ethyl N-(2-anilinopyridin-3-yl)carbamate

ethyl N-(2-acetyl-1-benzofuran-3-yl)carbamate

ethyl N-(2-benzoyl-1-benzofuran-3-yl)carbamate