Synonyms: Benzimidazolium,5,6-dichloro-1-ethyl-2-[3-(3-ethyl-2-benzoxazolinylidene)propenyl]-3-(3-sulfopropyl)-,hydroxide, inner salt (8CI); Benzoxazolium,2-[3-[5,6-dichloro-1-ethyl-1,3-dihydro-3-(3-sulfopropyl)-2H-benzimidazol-2-ylidene]-1-propenyl]-3-ethyl-,hydroxide, inner salt; Benzoxazolium,2-[3-[5,6-dichloro-1-ethyl-1,3-dihydro-3-(3-sulfopropyl)-2H-benzimidazol-2-ylidene]-1-propenyl]-3-ethyl-,inner salt (9CI);Anhydro-5,6-dichloro-1,3'-diethyl-3-(3-sulfopropyl)benzimidazolooxacarbocyaninehydroxide; Anhydro-5,6-dichloro-1,3'-diethyl-3-(3-sulfopropyl)benzoimidazolocarbocyaninehydroxide