| 摘要 |
A compound represented by the following formula (1): wherein C1 and C2 are independently a carbon atom; X1 to X4 are independently N, CH or C(R1); L is a group represented by the formula (2): -L1-(A)n; L1 is a group represented by the formula (3); A is alkyl, cycloalkyl, alkoxy, cycloalkoxy, aryl, aryloxy, arylthio, heteroaryl, heteroaryloxy, amino, silyl, diaryloxyphosphinyl, a divalent group corresponding to these groups, fluoro or cyano. |
