Salazodine;salazodin;2-hydroxy-5-[[4-[6-methoxy-3-piridazinil)amino]-sulphonyl]phenyl]azo]-benzoic acid;5-[[p-[(6-Methoxy-3-pyridazinyl)sulfamoyl]phenyl]azo]salicylic acid;2-Hydroxy-5-[(4-{[(6-methoxy-3-pyridazinyl)amino]-sulfonyl}phenyl)diazenyl]benzoic acid