ethyl 7-methyl-2,4-dioxo-7-phenyl-5,6-dihydro-1H-pyrano[2,3-d]pyrimidine-6-carboxylate

5-(dimethylaminomethylidene)-1,3-diazinane-2,4,6-trione

4-[(2,4,6-trioxo-1,3-diazinan-5-yl)diazenyl]benzoic acid

5-(2-甲基丙基)-2,4,6(1H,3H,5H)-嘧啶三酮

5-亚硝基-2,4,6-三羟基嘧啶