Patent ID: 7659296

Claim:
A compound or a pharmaceutically acceptable salt thereof represented by a formula below: wherein R and R′ are independently C 1 -C 5 alkyl: RP 3 is selected from: hydrogen or C 1 -C 5 alkyl: (L P1 ) and (L P2 ), are divalent linking groups independently selected from the group consisting of: a bond, (CH 2 ) m —CH(OH)—, (CH 2 ) m —C(Me)(OH)—(CH 2 ) m —O—, (CH 2 ) m —C(R40)(R41)-, and —(CH 2 ) m —C(O)—, where m is 0-5; R40 and R41 each is independently hydrogen or C 1 -C 5 alkyl; Z P is a branched C 3 -C 5 alkyl Z XB is selected from: C 0 -C 5 alkyl-CO 2 H, C 0 -C 5 alkyl-N(R40)(R41) or C(O)(OC 1 -C 5 alkyl), C(O)N(R40)(R41), N(R42)-(C 1 -C 5 alkyl)CO 2 H, and —N(R42)-(C 1 -C 5 alkyl)C(O)(OC 1 -C 5 alkyl): R42 is H or C 1 -C 3 alkyl; provided that Z XB is substituted at either the 5 or 6 position of the benzoxazole ring.