23000-37-5
1,5-dihydropyrimido[5,4-d]pyrimidine-4,6,8-trione
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16888-01-0
4-(2,4-dimorpholin-4-ylpyrimido[5,4-d]pyrimidin-8-yl)morpholine
110-91-8
吗啉
+
77776-68-2
2,4,8-trichloropyrimido[5,4-d]pyrimidine