Patent ID: 8247091

Claim:
A compound represented by formula (IIA): wherein L 1 represents a group selected from the group consisting of wherein R 0 is selected from the group consisting of an alkyl group containing from 1 to 20 carbon atoms, an alkenyl group containing from 2 to 10 carbon atoms, an aryl group containing from 6 to 20 carbon atoms, an amino group containing from 0 to 20 carbon atoms, an alkoxy group containing from 1 to 20 carbon atoms, an aryloxy group containing from 6 to 20 carbon atoms, an acyl group containing from 1 to 20 carbon atoms, an alkoxycarbonyl group containing from 2 to 20 carbon atoms, an alkylthio group containing from 1 to 20 carbon atoms, a sulfonyl group containing from 1 to 20 carbon atoms, a hydroxyl group, a halogen atom, a cyano group, a nitro group and a 5- to 7-membered hetero ring group, and m represents an integer of from 1 to 5, and R 21 , R 22 , R 51 , R 52 , R 53 , R 54 , R 55 and R 56 each independently represents a hydrogen atom or a substituent.