3,6-二甲基-1H-嘧啶-2,4-二酮

1,6-dimethylpyrimidine-2,4-dione

1,3,4-三甲基尿嘧啶

4,5,7,7-tetramethyl-3H-pyrano[2,3-d]pyrimidin-2-one

3-乙基-6-甲基-1H-嘧啶-2,4-二酮