3,6-bis(9-phenyl-9H-carbazol-3-yl)-9H-carbazole;3,6-bis(9-phenylcarbazol-3-yl)carbazole;9,9''-diphenyl-9H,9'H,9''H-3,3':6',3''-tercarbazole;9,9''-Diphenyl-9H,9'H,9''H-3,3':6',3''-tercarbazole (This product is only available in Japan.);9'-phenyl-6-(9-phenyl-9H-carbazol-3-yl)-9H,9'H-3,3'-bicarbazole;3,3':6',3''-Ter-9H-Carbazole, 9,9''-diphenyl-
