138169-43-4 2H-Tetrazolium, 5-(3-(carboxymethoxy)phenyl)-3-(4,5-dimethyl-2-thiazolyl)-2-(4-sulfophenyl)-, hydroxide, inner salt 3-(4,5-Dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium 3-MTS