1-(Pyridin-2-yl)urea
(Dimethylcarbamoyl)glycine
Fmoc-HoCit-OH
1,3-Bis(2-chloroethyl)urea
1-(Tert-butyl)urea
N-((4,6-Dimethoxypyrimidin-2-yl)carbamoyl)-3-(trifluoromethyl)pyridine-2-sulfonamide
1,3-Bis(2-phenylethyl)urea
1,3-Dibenzylurea
Fmoc-D-citrulline
1-(4,6-Dimethoxypyrimidin-2-yl)urea
Chlorfluazuron
Mesosulfuron-methyl
Tribenuron-methyl
Halocarban
1-(4-bromopyridin-2-yl)-3-ethylurea
Urea-13C
1-(4-Chlorophenyl)-3-(1-methyl-4-oxo-4,5-dihydro-1h-imidazol-2-yl)urea
N-Carbamoyl-L-aspartic acid
N-Biotinyl-6-aminohexanoic acid
(2-Chloro-acetyl)-urea