5-(Trifluormethyl)uracil Uracil Harnsure 5-Nitrouracil 5-Chloruracil 5-Aminouracil 5-Methyluracil Flucytosin 2,4-Dihydroxypyrimidin-5-carbonsure 6-Methyluracil 5-Ioduracil Cytosin Dinatriumuridin-5'-monophosphat 5-Bromuracil Fluoruracil 5-Nitro-2,6-dioxo-1,2,3,4-tetrahydropyrimidin-4-carbonsure 7,9-Dihydro-1,7-dimethyl-1H-purin-2,6,8(3H)-trion Uridin-5'-(trinatriumpyrophosphat)