54001-63-7
4,5-嘧啶二甲酸
→
~56%
26060-79-7
furo[3,4-d]pyrimidine-5,7-dione
52942-64-0
diethyl (2Z)-2-(ethoxymethylidene)-3-oxobutanedioate
36978-53-7
diethyl pyrimidine-4,5-dicarboxylate