Patent ID: 8431513

Claim:
A compound represented by formula (I): [wherein R 11 to R 14 each independently represent a halogen atom, a C 1 -C 6 alkyl group, or a C 2 -C 6 alkenyl group; n, p, q, and r each independently represent 0 or any integer of 1 to 4; m represents 0 or any integer of 1 to 2; a represents any integer of 1 to 10; R 2 represents a hydrogen atom or a C 1 -C 6 alkyl group; R 3 represents a hydroxy group, an OR 51 group, a NR 52 R 53 group, a SR 54 group, or OM; R 51 represents a C 1 -C 6 alkyl group, a C 2 -C 6 alkenyl group, an optionally substituted phenyl group, or an optionally substituted benzyl group; R 52 to R 54 each represent a hydrogen atom, a C 1 -C 6 alkyl group, a C 2 -C 6 alkenyl group, an optionally substituted phenyl group, or an optionally substituted benzyl group, and R 52 and R 53 together optionally form a saturated or unsaturated C 4 -C 10 ring, which, optionally, further comprises at least one heteroatom selected from S, N, and O; M represents a metal atom; and R 41 and R 42 each independently represent a hydrogen atom, a C 1 -C 6 alkyl group, a C 2 -C 6 alkenyl group, or a protective group for the hydroxy group].