Acetone thiosemicarbazone1752-30-348 % similar Methylurea598-50-540 % similar Ethylurea625-52-537 % similar tert-Butylurea1118-12-336 % similar Semicarbazide57-56-735 % similar Propylurea627-06-534 % similar N-Acetylthiosemicarbazide2302-88-734 % similar Isobutylurea592-17-633 % similar Butylurea592-31-433 % similar N-Octadecylurea2158-08-932 % similar (2-Hydroxyethyl)urea2078-71-931 % similar Aminourea hydrochloride563-41-731 % similar Carbazochrome69-81-831 % similar Allylurea557-11-930 % similar