3-ethyl-2-[(2Z)-2-(3-ethyl-6-sulfo-1,3-benzothiazol-2(3H)-ylidene)hydrazino]-6-sulfo-3H-1,3-benzothiazol-1-ium
3-ethyl-2-[(2z)-2-(3-ethyl-6-sulfo-1,3-benzothiazol-2(3h)-ylidene)hydrazino]-6-sulfo-3h-1,3-benzothiazol-1-ium