Catsyn offer gram to tons of Ethyl 2-[(3,5-dibromo-4-hydroxyphenyl)(3,5-dibromo-4-oxo-2,5-cyclohexadien-1-ylidene)methyl]benzoate | CAS 1176-74-5, its formula is C22H14Br4O4, molecular weight is 661.96g/mol and the purity is usually NLT 98%.