英文别名1H-Indole-2-sulfonic acid, 6-hydroxy-1-methyl; Carbazochrome Impurity 6; Carbazochrome Sodium Sulfonate Impurity 6; Carbazochrome Sodium Sulfonate Impurity IV; Carbazochrome Impurity; Sodium carbazosulfonate impurity 2; Carbazochrome sodium sulfonate impurity 
