Patent ID: 7199114

Claim:
A compound of formula (I): wherein each R 1 is independently absent, oxy, thio, or imino; each R 2 is independently absent or alkylene; each R 3 is independently hydrogen, N + -containing heteroaryl, N + -containing heterocycle, or —N + R a R b R c ; provided at least one R 3 is N + -containing heteroaryl, N + -containing heterocycle, or —N + R a R b R c ; R a , R b , and R c are each independently (C 1 –C 24 )alkyl, aryl, arylalkyl, heteroarylalkly, heterocycle, or heterocyclealkyl; each n is independently 0–4, provided at least one n is not 0; any heteroaryl, heterocycle, or R a , R b , or R c of R 3 can optionally be substituted on carbon with one or more alkyl, hydroxyalkyl, arylalkyl, heteroarylalkyl, aryl, heterocycle, heterocyclealkyl, oxo, hydroxy, halo, nitro, cyano, (C 1 –C 6 )alkoxy, trifluoromethyl, —COOR d , —NR d R e , or cycloalkylalkyl; any cycloalkylalkyl can optionally be substituted on carbon with one or more hydroxyl, N + -containing heteroaryl, N + -containing heterocycle, or —N + R a R b R c N + -containing heteroarylalkyloxy, N + -containing heterocyclealkyloxy, or —N + R a R b R c oxy; R d and R e are each independently hydrogen or alkyl; any alkylene of R 2 or alkyl of R 3 can optionally be substituted on carbon with one or more oxo, hydroxy, halo, nitro, cyano, (C 1 –C 6 )alkoxy, trifluoromethyl, —COOR d , or —NR d R e , and optionally interrupted on carbon with one or more oxy, imino, or thio, and is optionally partially unsaturated; or an acceptable salt thereof.