Patent ID: 7732606

Claim:
A compound represented by the formula (V): wherein L 1 , L 2 and L 3 each independently represent a single bond or a linking group; R 1 , R 3 , R 4 , R 5 , R 7 and R 8 each independently represent a hydrogen atom or a substituent; wherein R 2 and R 6 each independently represent an alkyl group, an aryl group, an amino group, an aryloxy group, a heterocyclic oxy group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylthio group, an arylthio group, a heterocyclicthio group, a sulfonyl group, a halogen group, a cyano group, a heterocyclic group, a silyl group or a silyloxy group; R a and R b each independently represent a hydrogen atom, an alkyl group, an aryl group, an amino group, an alkoxy group or a fluorine atom; and n and m each independently represent an integer of from 0 to 3.