Patent ID: 8486959

Claim:
A compound of the following formula: wherein each of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , and R 10 , independently, is H, alkyl, alkenyl, alkynyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, halo, nitro, cyano, —OR a , —OC(O)R a , —C(O)OR a , —NR a R b , —NR a C(O)R b , or —C(O)NR a R b , each of R a and R b , independently, being H, alkyl, aryl, heteroaryl, cycloalkyl, or hetercycloalkyl; at least one of R 1 -R 8 is OR a ; X Y, together, are C(R′)(R″)—N, in which R′ is H, alkyl, alkenyl, alkynyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, halo, nitro, or cyano, and R″ is H, alkyl, alkenyl, alkynyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, halo, nitro, cyano, —OR c , or —OC(O)R c , R c being H, alkyl, aryl, heteroaryl, cycloalkyl, or hetercycloalkyl; is a single bond; and A is H, alkyl, alkenyl, alkynyl, cycloalkyl, heterocycloalkyl, aryl, or heteroaryl.