A compound selected from the group consisting of 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3a]pyrimidin-5-yl]-phenyl}-ethyl)-4-methoxy-pyridinium bromide; 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidin-5-yl]-phenyl}-ethyl)-3-hydroxy-pyridinium bromide; 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidin-5-yl]-phenyl}-ethyl)-2-methylpyridinium bromide; 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidin-5-yl]-phenyl}-ethyl)-4-hydroxymethyl-pyridinium bromide; 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidin-5-yl]-phenyl}-ethyl)-4-isopropyl-pyridinium bromide; 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidin-5-yl]-phenyl}-ethyl)-5-hydroxy-2-methyl-pyridinium bromide; 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidin-5-yl]-phenyl}-ethyl)-2,4-dimethyl-pyridinium bromide; 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidin-5-yl]-phenyl}-ethyl)-3,5-dimethyl-pyridinium bromide; 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidin-5-yl]-phenyl}-ethyl)-2-ethylpyridinium bromide; 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidin-5-yl]-phenyl}-ethyl)-2-(2-hydroxy-ethyl)-pyridinium bromide; 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidin-5-yl]-phenyl}-ethyl)-4-ethylpyridinium bromide; and the pharmaceutically acceptable salts thereof. 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3a]pyrimidin-5-yl]-phenyl}-ethyl)-4-methoxy-pyridinium bromide; 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidin-5-yl]-phenyl}-ethyl)-3-hydroxy-pyridinium bromide; 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidin-5-yl]-phenyl}-ethyl)-2-methylpyridinium bromide; 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidin-5-yl]-phenyl}-ethyl)-4-hydroxymethyl-pyridinium bromide; 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidin-5-yl]-phenyl}-ethyl)-4-isopropyl-pyridinium bromide; 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidin-5-yl]-phenyl}-ethyl)-5-hydroxy-2-methyl-pyridinium bromide; 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidin-5-yl]-phenyl}-ethyl)-2,4-dimethyl-pyridinium bromide; 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidin-5-yl]-phenyl}-ethyl)-3,5-dimethyl-pyridinium bromide; 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidin-5-yl]-phenyl}-ethyl)-2-ethylpyridinium bromide; 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidin-5-yl]-phenyl}-ethyl)-2-(2-hydroxy-ethyl)-pyridinium bromide; 1-(2-{5-Cyano-2-[ -6-methoxycarbonyl-7-methyl-3-oxo-8-(3-trifluoromethylphenyl)-2,3,5,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrimidin-5-yl]-phenyl}-ethyl)-4-ethylpyridinium bromide;