2-(formylcarbamoylamino)-2-oxoacetic acid

酸草醯脲

6-羟基二氢-2,4,5(3H)-嘧啶三酮

3-benzyl-4,5-dihydro-2H-pyrimido[4,5-e][1,3]oxazine-6,8-dione

N,N,N',N'-四甲基对苯二胺