Patent ID: 7897602

Claim:
A compound of formula (I): wherein A is O or S; R 1 is H, alkyl, alkenyl, alkynyl, halo, nitro, cyano, cycloalkyl, heterocycloalkyl, cycloalkenyl, heterocycloalkenyl, OR a , NR a R b , —S(O) 2 R a , —S(O) 2 NR a R b , —C(O)R a , —C(O)NR a R b , —NR a C(O)R b , —NR a S(O) 2 R b , —N═CR a R b , or —NR a C(O)NHR b , in which each of R a and R b , independently, is H, alkyl, alkenyl, alkynyl, aryl, aryloxy, alkoxy, hydroxy, heteroaryl, cycloalkyl, heterocycloalkyl, cycloalkenyl, or heterocycloalkenyl, or R a and R b , together with the nitrogen atom to which they are bonded, are heteroaryl, heterocycloalkyl, or heterocycloalkenyl; each of R 2 , R 3 , and R 4 , independently, is H, halo, nitro, cyano, aryl, heteroaryl, cycloalkyl, heterocycloalkyl, cycloalkenyl, heterocycloalkenyl, OR a , NR a R b , —S(O) 2 R a , —S(O) 2 NR a R b , —C(O)R a , —C(O)NR a R b , —NR a C(O)R b , —NR a S(O) 2 R b , —N═CR a R b , or —NR a C(O)NHR b ; and R 5 is —C(O)OR c , —C(O)R c , —C(O)NR c R d , or —CH 2 NR c R d , in which each of R c and R d , independently, is H, alkyl, alkenyl, or alkynyl, or R c and R d , together with the nitrogen atom to which they are bonded, are heteroaryl, heterocycloalkyl, or heterocycloalkenyl.