1,6-dimethyl-3-oxo-2,3-dihydro-1H-3λ4-[1,2,3,5]thiatriazolo[5,4-c]pyrimidine-5,7-dione

6-methyl-3-oxo-2,3-dihydro-1H-3λ4-[1,2,3,5]thiatriazolo[5,4-c]pyrimidine-5,7-dione

6-[amino(methyl)amino]-3-methyl-1H-pyrimidine-2,4-dione

1-(1,3-dimethyl-2,6-dioxo-1,2,3,6-tetrahydro-pyrimidin-4-yl)-4-ethyl-thiosemicarbazide

6-hydrazino-3-methyl-1H-pyrimidine-2,4-dione