4-Fluoro-6-(2,2,2-trifluoroethoxy)-2-pyrimidinamine
6-Fluoro-2-[(phenylmethyl)amino]-4(1H)-pyrimidinone
6-Benzylaminothymine
5-Bromo-3,6-dimethyluracil
5-Bromoorotic acid
[[1,4-Dihydro-4-oxo-6-(trifluoromethyl)-2-pyrimidinyl]thio]-acetic acid
DDAO
DDAO is used as a calibration standard for DDAO-based enzyme substrates