Synonyms: 1H-Benzimidazolium,3-[4-[(acetylamino)sulfonyl]butyl]-5-cyano-2-[3-(5-cyano-1,3-diethyl-1,3-dihydro-2H-benzimidazol-2-ylidene)-1-propenyl]-1-ethyl-,bromide (9CI); Benzimidazolium,3-[4-(acetylsulfamoyl)butyl]-5-cyano-2-[3-(5-cyano-1,3-diethyl-2-benzimidazolinylidene)propenyl]-1-ethyl-,bromide (8CI)