5-hydroxy-1,3-dimethylpyrimidine-2,4-dione

1,3,4-三甲基尿嘧啶

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

5-溴-1,3-二甲基-6-苯基尿嘧啶

1,3-dimethyl-5-phenylpyrimidine-2,4(1H,3H)-dione