5-Butyl-6-methyl-2-thiouracil, EINECS 249-447-5, Tireobutil, 5-butyl-6-methyl-2-thioxo-2,3-dihydro-1H-pyrimidin-4-one, 5-butyl-2-mercapto-6-methylpyrimidin-4-ol, Butystat, 5-Butyl-6-methyl-2-thioxo-2,3-dihydro-1H-pyrimidin-4-on, Uracil,5-butyl-6-methyl-2-thio, 5-butyl-4-hydroxy-2-mercapto-6-methylpyrimidine