3-硝基-5,6-二苯基-1H-吡嗪-2-酮

2,3-diphenyl-pyrazine-1,4-dioxide

3-chloro-5,6-diphenyl-1H-pyrazin-2-one

2-chloro-5,6-diphenylopyrazine 4-oxide

2,3-二苯基哌嗪