23899-73-2
2(1H)-嘧啶酮,5,6-二氨基-
+
431-03-8
2,3-丁二酮
→
89977-50-4
6,7-dimethyl-1H-pteridin-2-one
32587-05-6
2-chloro-6,7-dimethyl-pteridine