5-甲基呋喃醛

6-(2-aminophenyl)-1,3-dimethyl-5-phenyl-1H-pyrrolo[3,4-d]pyrimidine-2,4(3H,6H)-dione

2,4-二羟基-6-甲基嘧啶

1,3,4-三甲基尿嘧啶

5-benzoyl-1,3,6-trimethylpyrimidine-2,4(1H, 3H)dione