英文别名Sulfasalazine EP Impurity A; Sulfasalazine specified impurity A [EP]; 2,4-Bis[[p-(2-pyridylsulfamoyl)phenyl]azo]hydroxybenzene; 2,4-Bis[[4-(2-pyridylsulfamoyl)phenyl]azo]phenol; 4-[(2Z)-2-[6-oxo-3-[[4-(pyridin-2-ylsulfamoyl)phenyl]diazenyl]cyclohexa-2,4-dien-1-ylidene]hydrazinyl]-N-pyridin-2-ylbenzenesulfonamide; 4,4'-[(1E,1'E)-(4-Hydroxy-1,3-phenylene)bis(diazene-2,1-diyl)]bis[N-(2-pyridyl)benzenesulfonamide]; Sulfasalazine Impurity A; 4-[[4-hydroxy-3-[[4-(pyridin-2-ylsulfamoyl)phenyl]diazenyl]phenyl]diazenyl]-N-pyridin-2-ylbenzenesulfonamide; Sulfasalazine Impurity 1; Salazopyridine EP Impurity A 
