甲基碘

3-(N'-methyl-ureido)-crotonic acid ethyl ester

3,6-dimethyl-1,3-oxazine-2,4-dione

3,6-dimethyl-2-sulfanylidene-1H-pyrimidin-4-one

2-hydrazino-3,6-dimethylpyrimidin-4-(3H)-one