Patent ID: 6858592

Claim:
A compound represented by the following structural formula: or a pharmaceutically acceptable salt thereof, wherein: Phenyl Ring A is substituted or unsubstituted; X is —CZ″ 2 -, —CHZ″-, —CO— or —SO 2 —; R is a substituted or unsubstituted straight chained C6-C30 hydrocarbyl group optionally comprising one or more amine, ammonium, ether, thioether or phenylene linking groups; Y is —H, an amine, —[NH—(CH 2 ) q ] r —NH 2 , halogen, —CF 3 , thiol, ammonium, —OH, —COOH, —SO 3 H, —OSO 3 H or phosphonium group covalently bonded to the terminal position of R, provided that when Y is —H and R is a straight chained hydrocarbyl group, then R has from 6 to 30 carbon atoms, wherein each —NH— in —[NH—(CH 2 ) q ] r —NH 2 is optionally N-alkylated or N,N-dialkylated and —NH 2 in —[NH—(CH 2 ) q ] r —NH 2 is optionally N-alkylated, N,N-dialkylated or N,N,N-trialkylated; Z″ is a halogen; q is an integer from 2 to about 10; and r is an integer from 1 to about 5.