3,3-(3,3-Dimethoxy-4,4-biphenylene)bis(2,5-diphenyl-2H-tetrazolium chloride); BTC; Blue Tetrazolium chloride; Tetrazolium Blue Chloride; Tetrazolium Blue BT; 3,3-(3,3-Dimethoxy-4,4-biphenylene) bis (2,5-diphenyl 2H-tetrazolium chloride); Tetrazole blue