5,6-diphenyl-3-(2-pyridyl)-1,2,4-triazinePDT3-(2-Pyridyl)-5,6-diphenyl-1,2,4-triazine3-(2-吡啶基)-5,6-二苯基-1,2,4-三嗪5,6-Diphenyl-3-(2-pyridyl)-1,2,4-triazine5,6-二苯基-3-(2-吡啶基)-1,2,4-三嗪3-(2-Pyridyl)-5,6-diphenyl-1,2,4-triazine5,6-Diphenyl-3-(2-pyridyl)-1,2 4-triazine5,6-联苯基-3-(2-吡啶基)-1,2,4-三吖嗪