Patent ID: 7645496

Claim:
A compound represented by formula (I): wherein L 1 and L 2 each represent a single bond or a divalent linking group, which may be the same or different from each other; R 1 and R 2 each independently represent a hydrogen atom or a substituent; R 31 and R 41 each represent a substituent, which may be the same or different from each other; n1 represents an integer of 0 to 4; when n1 is 2 or more, R 31 's may be the same or different from each other, or R 31 's may form a ring, if possible; m1 represents an integer of 0 to 4; when m1 is 2 or more, R 41 's may be the same or different from each other, or R 41 's may form a ring, if possible; X 1 represents an integer of 1 to 5; when X 1 is 2 or more, (R 41 ) m1 's may be the same or different from each other; and R 51 represents an alkoxy group, an alkoxycarbonyl group, or an alkoxycarbonyloxy group, each of which has a group represented by P1, P2, P3, or P4, in which an alkoxy moiety of the group represented by R 51 may have an ether bond therein: wherein R 511 , R 512 , R 513 , R 521 , R 522 , R 523 , R 531 , R 532 , R 533 , R 541 , R 542 , R 543 , R 544 , and R 545 each independently represent a hydrogen atom or an alkyl group; and n represents 0 or 1.