Patent ID: 7902368

Claim:
A compound of formula (Ia) or (Ib) wherein Q 1 is a direct bond or a —CH 2 — group; wherein if Q 1 is a direct bond, T 8 is hydrogen, and if Q 1 is —CH 2 —, T 8 is methyl or ethyl; T 1 , T 2 , T 3 and T 4 are independently methyl or ethyl with the proviso that at least one is ethyl; T 7 is hydrogen or methyl; T 5 is hydrogen; T 6 is hydrogen, —O-T 9 or —NR 9 -T 9 ; or T 5 and T 6 together are a group ═O, ═NOH, ═NO-T 9 or T 9 is hydrogen, R 9 or —C(O)—R 9 ; K 1 and K 2 are independently hydrogen, C 1 -C 18 alkyl, C 5 -C 12 cycloalkyl, phenyl or C 7 -C 9 phenylalkyl and K 3 is a group —COK 4 or where K 4 is —Y—[(CH 2 —CH 2 )—(CH 2 ) s —N + R 5 R 6 X − ] t — CH 2 —CH 2 —(CH 2 ) s —N + R 5 R 6 R 7 X − or —Y—CH 2 —CHOH—CH 2 —N + R 5 R 6 X − —{[(CH 2 —CH 2 )—(CH 2 ) s —N + X − R 5 R 6 ] t —CH 2 —CH 2 —(CH 2 ) s —N + R 5 R 6 R 7 X − } u , where s is a number from 0-4, t is a number from 0-4 and u is 1; or K 4 is a group Z is —C(O)— or a direct bond, wherein if Z is —C(O)—, K 5 has the same meaning as K 4 , and if Z is a direct bond, K 5 is Y—CH 2 —CHOH—CH 2 —N + R 5 R 6 X − —{[(CH 2 —CH 2 )—(CH 2 ) s —N + R 5 R 6 X − ] t —CH 2 —CH 2 —(CH 2 ) s —N + R 5 R 6 R 7 X − } u , Q + X − , —CH 2 Q + X − or —CHCH 3 Q + X − ; Y is —O— or —NR 9 ; Q + X − is R 5 , R 6 and R 7 are each independently hydrogen, C 1 -C 18 alkyl, C 3 -C 12 cycloalkyl, phenyl, C 7 -C 9 phenylalkyl or C 6 -C 10 heteroaryl, which all may be unsubstituted or substituted by halogen, OH, NO 2 , CN, or C 1 -C 4 alkoxy; or R 5 , R 6 and R 7 together with the nitrogen atom to which they are bonded form a 3-12 membered monocyclic or polycyclic ring; R 9 is hydrogen, C 1 -C 18 alkyl, C 3 -C 18 alkenyl, C 3 -C 18 alkynyl, phenyl, or C 7 -C 9 phenylalkyl, which all may be unsubstituted or substituted by one or more hydroxy, halogen or C 1 -C 4 alkoxy groups; X − is selected from the group consisting of mono- or poly-C 1 -C 18 carboxylate, fluoride, chloride, bromide, iodide, nitrite, nitrate, hydroxide, acetate, hydrogen sulfate, sulfate, C 1 -C 18 alkoxy sulfate, aromatic or aliphatic sulfonate, carbonate, hydrogen carbonate, perchlorate, chlorate, tetrafluoroborate, borate, phosphate, hydrogen phosphate, and dihydrogen phosphate.