4-((2-hydroxyphenyl)diazenyl)-N-(pyridin-2-yl)benzenesulfonamide;2-[[4-(2-Pyridylsulfamoyl)phenyl]azo]hydroxybenzene; 4-[2-(2-Hydroxyphenyl)diazenyl]-N-2-pyridinylbenzenesulfonamide;
4-((2-hydroxyphenyl)diazenyl)-N-(pyridin-2-yl)benzenesulfonamide;2-[[4-(2-Pyridylsulfamoyl)phenyl]azo]hydroxybenzene; 4-[2-(2-Hydroxyphenyl)diazenyl]-N-2-pyridinylbenzenesulfonamide;