5-[(2-chlorophenyl)methylidene]-1,3-diazinane-2,4,6-trione

4-[(2,4,6-trioxo-1,3-diazinan-5-ylidene)methyl]benzonitrile

1,3,6,8-tetrahydro-2,4,5,7-pyrimido<5,4-g>pteridinetetrone

5-乙酰基-2,4,6(1H,3H,5H)-嘧啶三酮

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