TETRAZOLE BLUE DIFORMAZAN;TETRAZOLIUM BLUE DIFORMAZAN;DITETRAZOLIUM DIFORMAZAN;BLUE TETRAZOLIUM DIFORMAZAN;1,1'-(3,3'-dimethoxy-4,4'-biphenylylene)bis[3,5-diphenylformazane];Tctrazolium blue;3,3'-Dimethoxy-4,4'-bis[α-(phenylhydrazono)benzylazo]biphenyl;BTDF