3-Ethyl-5,6-dimethyl-2-[2-[[5-methyl-3-(2-methyl-3-sulfonatopropyl)benzoselenazol-2(3H)-ylidene]methyl]-1-butenyl]benzothiazolium

3-ethyl-5,6-dimethyl-2-[2-[[5-methyl-3-(2-methyl-3-sulphonatopropyl)-3H-benzoselenazol-2-ylidene]methyl]but-1-enyl]benzothiazolium