A compound of general formula wherein: R 1 is aryl optionally substituted by one or more substituents selected from the group consisting of halogen atoms, OH, SH, NO 2, CN, COOH, (C 1 -C 6)alkoxycarbonyl, (C 1 -C 6)alkylsulfanyl, (C 1 -C 6)alkylsulfinyl, (C 1 -C 6)alkylsulfonyl, (C 1 -C 6)alkyl, (C 1 -C 6)haloalkyl, (C 1 -C 6)alkoxy and (C 1 -C 6)haloalkoxy; R 2 is aryl optionally substituted by one or more substituents selected from the group consisting of halogen atoms, OH, SH, NO 2, CN, COOH, (C 1 -C 6)alkoxycarbonyl, (C 1 -C 6)alkylsulfanyl, (C 1 -C 6)alkylsulfinyl, (C 1 -C 6)alkylsulfonyl, (C 1 -C 6)alkyl, (C 1 -C 6)haloalkyl, (C 1 -C 6)alkoxy and (C 1 -C 6)haloalkoxy; W is selected from the group consisting of (C 1 -C 6)alkyl, aryl, -NH-heterocyclyl and heteroaryl, each of which optionally substituted by one or more substituents, the same or different, selected from the group consisting of halogen atoms, oxo, -NO 2, -CN, (C 1 -C 6)alkyl, (C 1 -C 6)alkoxy, (C 1 -C 6)haloalkyl, (C 1 -C 6)haloalkoxy, (C 3 -C 8)cycloalkyl, heterocyclyl, aryl, aryloxy, haloaryl, (C 1 -C 6)alkyl-NCO-(C 1 -C 6)alkyl, -OR 3, -N(R 3) 2, -SR 3, -OSO 2 R 3, -COR 3, -CO 2 R 3, -OCOR 3, -CON(R 3) 2, -NHCOR 3, -NHCO 2 R 3, -NHSO 2 R 3, -NHCO-(C 1 -C 6)alkyl-COOH, -CO 2 -(C 1 -C 6)alkyl-N(R 3) 2 and -CO-heterocyclyl; R 3 is H or is selected from the group consisting of (C 1 -C 6)alkyl and heteroaryl, optionally substituted by one or more substituents selected from the group consisting of phenyl, halogen atoms, OH, oxo, SH, NO 2, CN, CONH 2 and COOH; A - is a physiologically acceptable anion; and pharmaceutically acceptable salts thereof. R 1 is aryl optionally substituted by one or more substituents selected from the group consisting of halogen atoms, OH, SH, NO 2, CN, COOH, (C 1 -C 6)alkoxycarbonyl, (C 1 -C 6)alkylsulfanyl, (C 1 -C 6)alkylsulfinyl, (C 1 -C 6)alkylsulfonyl, (C 1 -C 6)alkyl, (C 1 -C 6)haloalkyl, (C 1 -C 6)alkoxy and (C 1 -C 6)haloalkoxy; R 2 is aryl optionally substituted by one or more substituents selected from the group consisting of halogen atoms, OH, SH, NO 2, CN, COOH, (C 1 -C 6)alkoxycarbonyl, (C 1 -C 6)alkylsulfanyl, (C 1 -C 6)alkylsulfinyl, (C 1 -C 6)alkylsulfonyl, (C 1 -C 6)alkyl, (C 1 -C 6)haloalkyl, (C 1 -C 6)alkoxy and (C 1 -C 6)haloalkoxy; W is selected from the group consisting of (C 1 -C 6)alkyl, aryl, -NH-heterocyclyl and heteroaryl, each of which optionally substituted by one or more substituents, the same or different, selected from the group consisting of halogen atoms, oxo, -NO 2, -CN, (C 1 -C 6)alkyl, (C 1 -C 6)alkoxy, (C 1 -C 6)haloalkyl, (C 1 -C 6)haloalkoxy, (C 3 -C 8)cycloalkyl, heterocyclyl, aryl, aryloxy, haloaryl, (C 1 -C 6)alkyl-NCO-(C 1 -C 6)alkyl, -OR 3, -N(R 3) 2, -SR 3, -OSO 2 R 3, -COR 3, -CO 2 R 3, -OCOR 3, -CON(R 3) 2, -NHCOR 3, -NHCO 2 R 3, -NHSO 2 R 3, -NHCO-(C 1 -C 6)alkyl-COOH, -CO 2 -(C 1 -C 6)alkyl-N(R 3) 2 and -CO-heterocyclyl; R 3 is H or is selected from the group consisting of (C 1 -C 6)alkyl and heteroaryl, optionally substituted by one or more substituents selected from the group consisting of phenyl, halogen atoms, OH, oxo, SH, NO 2, CN, CONH 2 and COOH; A - is a physiologically acceptable anion; and pharmaceutically acceptable salts thereof.