Patent ID: 8211896

Claim:
A compound of the formula (I), or a salt thereof: where X represents from 1 to 4 substituents independently selected from the group consisting of halogen, —CN, —NO 2 , —OH, —OR 1 , —C(O)R 1 , —CO 2 R 1 , —O(CO)R 1 , —C(O)NR 1 R 2 , —OC(O)NR 1 R 2 , —SR 1 , —SOR 1 , —SO 2 R 1 , —SO 2 NR 1 R 2 , —NR 1 R 2 , —NR 1 C(O)R 2 , —NR 1 C(O) 2 R 2 , —NR 1 SO 2 R 2 , —NR 1 (CO)NR 2 R 3 , unsubstituted or substituted C 1-8 alkyl, unsubstituted or substituted C 2-8 alkenyl, unsubstituted or substituted C 2-8 alkynyl, unsubstituted or substituted C 3-8 cycloalkyl, unsubstituted or substituted C 6-10 aryl, unsubstituted or substituted 5- to 10-membered heteroaryl, and unsubstituted or substituted 3- to 10-membered heterocyclyl; R 1 , R 2 and R 3 are each independently selected from the group consisting of hydrogen, unsubstituted or substituted C 1-6 haloalkyl, unsubstituted or substituted C 1-6 alkyl, unsubstituted or substituted C 3-6 cycloalkyl, unsubstituted or substituted C 2-6 alkenyl, unsubstituted or substituted C 2-6 alkynyl, unsubstituted or substituted C 6-10 aryl, unsubstituted or substituted 5- to 10-membered heteroaryl, unsubstituted or substituted aryl-C 1-4 alkyl, unsubstituted or substituted aryl-C 1-4 alkyl, and unsubstituted or substituted aryloxy-C 1-4 alkyl; or two of R 1 , R 2 and R 3 together with the atom(s) to which they are attached, may form an unsubstituted or substituted 5-, 6- or 7-membered ring; Y represents from 1 to 3 substituents, each independently selected from the group consisting of halogen, —CN, —NO 2 , —OH, —OR 4 , —C(O)R 4 , —CO 2 R 4 , —SR 4 , —SOR 4 , —SO 2 R 4 , and unsubstituted or substituted C 1-4 alkyl; R 4 is selected from the group consisting of hydrogen, unsubstituted or substituted C 1-6 haloalkyl, unsubstituted or substituted C 1-6 alkyl, unsubstituted or substituted C 3-6 cycloalkyl, unsubstituted or substituted C 2-6 alkenyl, and unsubstituted or substituted C 2-6 alkynyl; L is —C(O)—, —S—, —SO— or —S(O) 2 —; and Z represents either unsubstituted or substituted monocyclic or bicyclic C 5-10 heteroaryl or unsubstituted or substituted monocyclic or bicyclic C 3-10 heterocyclyl, with the proviso that when X is methyl, then Z is not 2-thiophene, 2-(3-hydroxy-1H-indole) or 3-(1-methylpyridinium).