2-[3-(3-ethyl-3H-benzothiazol-2-ylidene)-2-methylprop-1-enyl]-5,6-dimethyl-3-(3-sulphonatopropyl)benzothiazolium

2-[3-[3-Ethylbenzothiazol-2(3H)-ylidene]-2-methyl-1-propenyl]-5,6-dimethylbenzothiazol-3-ium-3-(1-propanesulfonate)