Patent ID: 8410309

Claim:
A compound having the formula and salts thereof, wherein R 1 is H, —OH, halogen, C 2 -C 4 alkenyl, C 1 -C 4 alkoxy, —C(O)R 8 , —NO 2 , —NR 9 R 10 , or —N + R 9 R 10 R 11 (R 12 ) − ; R 2 is H, —OH, halogen, C 2 -C 4 alkenyl, C 2 -C 4 alkoxy, —C(O)R 8 , —NO 2 , —NR 9 R 10 , or —N + R 9 R 10 R 11 (R 12 ); R 3 is H, halogen, C 2 -C 4 alkenyl, C 1 -C 4 alkoxy, —C(O)R 8 , —NO 2 , —NR 9 R 10 , or —N + R 9 R 10 R 11 (R 12 ); R 4 is H, —OH, halogen, C 2 -C 4 alkenyl, C 2 -C 4 alkoxy, —C(O)R 8 , —NO 2 , —NR 9 R 10 , or —N + R 9 R 10 R 11 (R 12 ); R 5 is —NO 2 , halogen, —NR 14 R 15 ,—N + R 14 R 15 R 16 (R 13 ) − , amide, C 1 -C 12 alkoxy, C 2 -C 12 alkenyl, carbamate, carbonate, ureido, or —C(O)R 18 ; R 5 is optionally substituted with halogen, —OH, —SH, or —COOH; R 5 is optionally interrupted by O, N, S, or —C(O)—; R 6 is a C 4 -C 12 linear or branched alkyl, C 2 -C 12 linear or branched alkenyl, or aryl; R 6 is optionally substituted with a C 1 -C 4 alkyl, C 2 -C 4 alkenyl, C 1 -C 4 alkoxy, —OH, —SH, halogen, —NH 2 , or —CO 2 R 8 ; R 6 is optionally interrupted by O or N; R 7 is a bond or aryl; R 7 is optionally substituted with —OH, halogen, —C(O)CH 3 , —NR 10 R 11 , or —N + R 10 R 11 R 12 (R 13 ) − ; R 8 is C 1 -C 4 alkyl, or C 2 -C 4 alkenyl; R 9 , R 10 , R 11 , and R 12 are independently H or C 1 -C 10 alkyl; R 13 is a halide, hydroxide, sulfate, tetrafluoroborate, or phosphate; and R 14 , R 15 and R 16 are independently C 1 -C 10 alkyl, C 2 -C 12 alkenyl, —C(O)R 7 ; R 17 is —OH, C 1 -C 10 alkyl, or C 2 -C 12 alkenyl; and R 18 is C 1 -C 6 alkyl, —OH, —NR 14 R 15 , or N + R 14 R 15 R 16 (R 13 ).