Patent ID: 6878822

Claim:
A compound represented by formula (IA): wherein (A) represents a vinylene group or an o-arylene group; Ar 1 and Ar 2 each represent an aryl group; R 1 and R 2 each represent an alkyl group or an aryl group; R 3 represents an alkyl group or an aryl group; R 4 and R 5 each represent a halogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, a dialkylamino group, an N-alkyl-N-arylamino group or a diarylamino group; or Ar 1 and R 1 , or Ar 2 and R 2 are taken together either directly or indirectly to form a ring; Ar 1 (R 1 )C═CH—(CH═CH) m — and Ar 2 (R 2 )C═CH—(CH═CH) n — are on the 2- or 3-position and the 7- or 8-position of the respective benzene rings; m and n each represent an integer of from 0 to 2; and p and q each represent an integer of from 0 to 3.