Patent ID: 7288548

Claim:
A compound according to formula (I): or a pharmaceutically acceptable salt thereof, wherein X, Y and Z are each independently CH 2 , C═O or CR 3 R 4 ; W is H, optionally substituted C 1-10 alkyl, optionally substituted C 2-10 alkenyl, optionally substituted C 2-10 alkynyl, optionally substituted C 6-12 aryl, optionally substituted 3 to 10 membered heterocycle, optionally substituted C 6-12 aralkyl or optionally substituted 3 to 10 membered heteroaralkyl; R 1 is H, optionally substituted C 1-10 alkyl, optionally substituted C 2-10 alkenyl, optionally substituted C 2-10 alkynyl, optionally substituted C 6-12 aryl, optionally substituted 3 to 10 membered heterocycle, optionally substituted C 6-12 aralkyl or optionally substituted 3 to 10 membered heteroaralkyl; R 2 is H, R 3 and R 4 are each independently H, optionally substituted C 1-10 alkyl, optionally substituted C 2-10 alkenyl, optionally substituted C 2-10 alkynyl, or optionally substituted C 6-12 aryl; R 5 , R 6 and R 7 are each independently H, optionally substituted C 1-10 alkyl, optionally substituted C 2-10 alkenyl, optionally substituted C 2-10 alkynyl, optionally substituted C 6-12 aryl, optionally substituted 3 to 10 membered heterocycle, optionally substituted C 6-12 aralkyl or optionally substituted 3 to 10 membered heteroaralkyl; or R 5 and R 6 can be taken together to form an optionally substituted 3 to 10 membered heterocycle.