611-10-9
2-氧代环戊羧酸乙酯
+
57-13-6
尿素
→
~84%
5466-00-2
6,7-二氢-1H-环戊并[D]嘧啶-2,4(3H,5H)-二酮
35563-27-0
1,2,3,5,6,7-六氢-2-硫氧代-4H-环戊并嘧啶-4-酮
~83%
160234-22-0
~45%
18227-09-3
122364-77-6
butyl 2-ureidocyclopent-1-enecarboxylate
33081-06-0
2-氨基-6,7-二氢-5H-环戊[d]嘧啶-4-醇