Synonyms: Benzoselenazolium,2-[2-[[5,6-dimethyl-3-(3-sulfopropyl)-2(3H)-benzoselenazolylidene]methyl]-1-butenyl]-5,6-dimethyl-3-(3-sulfopropyl)-,hydroxide, inner salt, sodium salt;Anhydro-bis[5,6-dimethyl-3-(3-sulfopropyl)-2-benzoselenazole]-b-ethyltrimethinecyaninehydroxide, sodium salt