76872-71-4
6-Methylthieno[2,3-d]pyrimidine-2,4(1H,3H)-dione
→
~74%
76872-23-6
2,4-dichloro-6-methylthieno[2,3-d]pyrimidine
138564-58-6
2-氨基-3-氰基-5-甲基噻吩
+
503-38-8
氯甲酸三氯甲酯
~63%