480-96-6
苯并呋咱
+
108-59-8
丙二酸二甲酯
→
~73%
21580-62-1
methyl 3-oxo-4H-quinoxaline-2-carboxylate
67-56-1
甲醇
1204-75-7
3-羟基-2-喹喔啉羧酸