Patent ID: 7943795

Claim:
A compound or a pharmaceutically acceptable salt thereof represented by Formula (I): wherein R and R′ are independently C 1 -C 5 alkyl; RP 3 is hydrogen or, C 1 -C 5 alkyl; RN is hydrogen; RP is hydrogen; (L P1 ) is, (CH 2 ) m —O—; (L P2 ) is (CH 2 ) m —CH(OH)—or —(CH 2 ) m —C(O)—; (L NP ) is a bond or —(CH 2 ) m —C(O)—; where m is 0-5; R40 and R41 each is independently selected from hydrogen or C 1 -C 5 alkyl; Z P is a branched C 3 -C 5 alkyl; Z NP is selected from C 0 -C 5 alkyl-CO 2 H, C 0 -C 5 alkyl-N(R40)(R41), N(R42)-(C 1 -C 5 alkyl)CO 2 H, —N(R42)-(C 1 -C 5 alkyl)C(O)(C 1 -C 5 alkyl), R42 is a C 1 -C 3 alkyl, and provided that -(L NP )-Z NP is substituted at either the 12 or 13 position of the naphthalene ring.