Patent ID: 8778945

Claim:
A compound having formula (FX1): wherein X 1 , X 2 , X 3 , X 4 , and X 5 are each independently C or N, wherein when X 1 , X 2 , X 3 , X 4 , or X 5 is N, the corresponding R 10 , R 11 , R 12 , R 13 , or R 14 is absent; one of R 10 , R 11 , R 12 , R 13 , and R 14 is where R a and R b are each independently selected from the group consisting of hydrogen, C1-C6 alkyl, and C1-C6 alkoxy; R 18 and R 19 are each independently selected from the group consisting of hydrogen and C1-C6 alkyl; and q is an integer from 0 to 3; R 7 , R 8 , and R 9 , and the others of R 10 , R 11 , R 12 , R 13 , and R 14 , are each independently selected from the group consisting of: hydrogen, halogen, a hydroxyl group, a sulfonamide group, a nitro group, an amino group, a carboxylate group, a sulfonyl group, an aryl sulfonyl group, C1-C6 alkyl, C1-C6 alkoxy, and C2-C6 alkenyl; R 3 is methoxy or allyl; n and m are each independently integers from 1 to 3; R 4 and R 5 are each independently CH or N; A is O or S; R 6 is hydrogen or C 1 -C 6 alkyl; X is oxygen; and R 2 is hydrogen or C1-C6 alkyl.