中文 2 2'-联嘧啶 2,2′-Bipyrimidine,2,2′-Dipyrimidyl 2,2'-二嘧啶 2,2-二嘧啶 2G 2,2'-二嘧啶, TYPICALL 2,2'-二嘧啶,96% 2,2钬BIPYRIMIDINE 2,2'-双嘧啶 2′-二嘧啶 英文 2-(pyriMidin-2-yl)pyriMidine 2,2'-BIPYRIMIDINE 2,2''-BIPYRIMIDINE TYPICALLY 97% 2,2'-Bipyrimidine,96% 2,2''-BIPYRIMIDINYL 2,2'-BipyriMidyl 2,2'-DIPYRIMIDYL