2-[2-[(3-Ethyl-5,6-dimethyl-3H-benzoselenazol-2-yliden)methyl] but-1-enyl]-6-methoxy-5-methyl-3-(3-sulfonatopropyl)benzoselenazolium

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

2-[2-[(3-Ethyl-5,6-dimethylbenzoselenazol-2(3H)-ylidene)methyl]-1-butenyl]-6-methoxy-5-methyl-3-[3-(sulfonato)propyl]benzoselenazol-3-ium