19155-88-5
苯并呋咱-5-羧酸
→
~81%
126147-86-2
苯并呋咱-5-碳酰氯
60741-56-2
6-[benzo[1,2-c]1,2,5-oxadiazol N1-oxide]carboxylic acid
1588-83-6
4-氨基-3-硝基苯甲酸