Patent ID: 8507672

Claim:
A compound of formula I: or a pharmaceutically acceptable salt thereof, wherein: X is O; Y is O or NR B ; A is aryl; R 1 is hydrogen, OR B , N(R B ) 2 , SR B , or optionally substituted alkyl, aryl, or heterocycle; R 2 is optionally substituted lower alkyl; each R 3 is independently halogen or optionally substituted alkyl, and/or two R 3 s may be taken together with the ring to which they are attached to provide an optionally substituted cycloalkyl or heterocyclyl; each R 4 is cyano, halogen, hydroxy, nitro, R C , OR C , N(R C ) 2 , NHC(O)R C , C(O)R C , C(O)N(R C ) 2 , or SO 2 R C ; each R B is independently hydrogen or optionally substituted alkyl; each R C is independently hydrogen or optionally substituted alkyl, heteroalkyl, aryl, heterocyclyl, alkylaryl, or alkylheterocycle; n is 0-8; and m is 0-4.