1 L85 4-[(E)-(4-hydroxyphenyl)diazenyl]benzenesulfonic acid 1.000 2 ORI 4-[(E)-(4-hydroxynaphthalen-1-yl)diazenyl]benzenesulfonic acid 0.826 3 4WA 4-[(E)-(4-aminophenyl)diazenyl]benzenesulfonamide 0.810 4 NSL 4-hydroxyazobenzene 0.789 5 0S0 4-[(E)-(6-hydroxy-2-oxo-1,2-dihydropyridin-3-yl)diazenyl]benzenesulfonamide 0.773