Patent ID: 8173803

Claim:
A compound of formula (I) or a salt or metal complex thereof: wherein: R 1 , R 2 , and R 3 are each independently selected from the group consisting of: H, optionally substituted linear or branched C 1 to C 20 alkyl, optionally substituted linear or branched C 2 to C 20 alkenyl, optionally substituted linear or branched C 2 to C 20 alkynyl, optionally substituted C 3 to C 20 alicyclic, aryl, heteroaryl, optionally substituted C 1 to C 20 alkylene-aryl, optionally substituted C 1 to C 20 alkylene-heteroaryl, and C 1 to C 20 alkylene-X 1 ; or R 1 , R 2 , and R 3 taken together are CR z , B, or a metal; R z is selected from the group consisting of Li, H, optionally substituted linear or branched C 1 to C 20 alkyl, optionally substituted linear or branched C 2 to C 20 alkenyl, optionally substituted linear or branched C 2 to C 20 alkynyl, optionally substituted C 3 to C 20 alicyclic, aryl, heteroaryl, optionally substituted C 1 to C 20 alkylene-aryl, and optionally substituted C 1 to C 20 alkylene-heteroaryl; R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , R 13 , R 14 , and R 15 are each independently selected from the group consisting of: H, F, Cl, Br, I, —NO 2 , —CN, —C(O)OH, —C(O)OR c , —C(O)H, —C(O)R c , —C(O)NH 2 , —C(O)NHR c , —C(O)NR c R d , —C(O)SR c , —NH 2 , —NHR c , —NR c R d , —OH, —OR c , —SH, —SR c , optionally substituted linear or branched C 1 to C 20 alkyl, optionally substituted linear or branched C 2 to C 20 alkenyl, optionally substituted linear or branched C 2 to C 20 alkynyl, optionally substituted C 3 to C 20 alicyclic, aryl, heteroaryl, optionally substituted C 1 to C 20 alkylene-aryl, optionally substituted C 1 to C 20 alkylene-heteroaryl, and C 1 to C 20 alkylene-X 2 ; X 1 and X 2 are each independently selected from the group consisting of: —C(O)OH, —C(O)OR a , —C(O)H, —C(O)R a , —C(O)NH 2 , —C(O)NHR a , —C(O)NR a R b , —C(O)SR a , —NH 2 , —NHR a , —NR a R b , —OH, OR a , —SH, and SR a ; and R a , R b , R c , and R d are each independently selected from the group consisting of: optionally substituted linear or branched C 1 to C 20 alkyl, optionally substituted linear or branched C 2 to C 20 alkenyl, optionally substituted linear or branched C 2 to C 20 alkynyl, optionally substituted C 3 to C 20 alicyclic, aryl, heteroaryl, optionally substituted C 1 to C 20 alkylene-aryl, and optionally substituted C 1 to C 20 alkylene-heteroaryl.