1-Methyl-3-sulfopropyl-5-trifluoromethyl-2-(3-(1-methyl-3-sulfopropyl-5-trifluoromethyl benzimidazolinylidene)-1-propenyl)benzimidazolium hydroxide,inner salt,sodium salt
1-Methyl-3-sulfopropyl-5-trifluoromethyl-2-(3-(1-methyl-3-sulfopropyl-5-trifluoromethyl benzimidazolinylidene)-1-propenyl)benzimidazolium hydroxide,inner salt,sodium salt