2-((3-Bromo-4-hydroxy-5-methylphenyl)(3-bromo-5-methyl-4-oxo-2,5-cyclohexadien-1-ylidene)methyl)benzenesulfonic acid AIDS-124021 AIDS124021 Benzenesulfonic acid, {2-[(5-bromo-4-hydroxy-3-methylphenyl)(3-bromo-5-methyl-4-oxo-2,} 5-cyclohexadien-1-ylidene)methyl\]- Bromocresol purple NSC6244 o-Toluenesulfonic acid, .alpha.-(5-bromo-4-hydroxy-m-tolyl)-.alpha.-(3-bromo-5-methyl-4-ox o-2,5-cyclohexadien-1-ylidene)-