6-benzylidenehydrazino-1,3-dimethyluracil

3,6-dimethyl-5,7-dioxo-4,5,6,7-tetrahydro-[1,2,3]thiadiazolo[4,5-d]pyrimidinium betaine

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

甲基碘

6-methyl-[1,2,3]thiadiazolo[4,5-d]pyrimidine-5,7(4H,6H)-dione