Benzoic acid, 2-[(3,5-dibromo-4-hydroxyphenyl)(3,5-dibromo-4-oxo-2,5-cyclohexadien-1-ylidene)methyl]-, ethyl ester, potassium salt (1:1)
Benzoic acid, 2-[(3,5-dibromo-4-hydroxyphenyl)(3,5-dibromo-4-oxo-2,5-cyclohexadien-1-ylidene)methyl]-, ethyl ester, potassium salt
Phenolphthalein, 3′,3′′,5′,5′′-tetrabromo-, ethyl ester, potassium deriv.
Tetrabromophenolphthalein ethyl ester potassium salt