1-(3-hydroxypropyl)-3,6-dimethylpyrimidine-2,4-dione

3-acetyl-4-amino-1-methyl-1H-pyrrole-2,5-dione

5-Imino-1,4-dimethyl-1,5-dihydro-2H-pyrrol-2-one

1,3-dimethyl-6-sulfanylidene-1,3,5-triazinane-2,4-dione