64784-13-0
indigo dye
→
2903-89-1
2-(3-oxoindol-2-yl)indol-3-one
+
6537-68-4
2-(3-hydroxy-1H-indol-2-yl)-1H-indol-3-ol
480-93-3
3-羟基吲哚
482-89-3
靛蓝