Patent ID: 7652141

Claim:
A compound of the formula: wherein Y is —NH—, —O—, or —(CH 2 ) 3-5 —; Y 2 is —C(═O)—NH— or —NH—C(═O)—; Y 3 is single bond or optionally substituted alkylene; R a is optionally substituted aryl, optionally substituted cycloalkyl, optionally substituted cycloalkenyl, optionally substituted heteroaryl or optionally substituted heterocycle; R 5 is C 3 or more alkyl or a group represented by the formula: —Y 6 —R e — wherein Y 6 is alkylene; and R e is optionally substituted aryl, optionally substituted cycloalkyl, optionally substituted heteroaryl, or optionally substituted heterocycle; or a pharmaceutically acceptable salt thereof.