7-(2-acetamido-4,6-di-O-acetyl-2,3-dideoxy-D-threo-hex-2-enopyranosyl)theophilline

1,3-二甲基-6-氨基脲嘧啶

5-氨基-1,3-二甲基嘧啶-2,4(1H,3H)-二酮

1,3-dimethyl-5-formylaminopyrimidine-2,4-dione

1,3-二甲基-6-亚氨基-5-异亚硝基尿嘧啶