23000-37-5
1,5-dihydropyrimido[5,4-d]pyrimidine-4,6,8-trione
→
89981-54-4
2-chloro-4-N,8-N-dimethylpyrimido[5,4-d]pyrimidine-4,8-diamine
77776-68-2
2,4,8-trichloropyrimido[5,4-d]pyrimidine
+
74-89-5
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