1983-81-9
4,7-二羟基香豆素
+
137-07-5
2-氨基苯硫醇
→
~34%
109363-81-7
3-hydroxy-12H-chromeno[3,4-b][1,4]benzothiazin-6-one
17575-15-4
4-羟基-7-甲氧基香豆酯