Patent ID: 8877940

Claim:
A compound of Formula I: or a pharmaceutically acceptable salt thereof, wherein: Y is O; Ring A is aryl, heteroaryl, or heterocycloalkyl, wherein ring A is unsubstituted or substituted by 1 to 5 R 1 ; R 1 is —NR a R b , NO 2 , or —NHC(O)R c ; or two R 1 together with the carbon atoms to which they are attached form a heteroaryl or heterocycloalkyl; R 2 is —NR a R b , —NHC(O)R a , NO 2 , —CN, —SR a , or —S(O) 2 R a ; R a and R b are each independently H or C 1-6 alkyl; R c is H, C 1-6 alkyl, or C 1-6 haloalkyl; and m is 1, 2, 3, or 4.