| abstract |
A compound of formula 1 n n n wherein: n A is a group selected from n n n X − is an anion with a single negative charge; n R 1 and R 2 are each independently a C 1 -C 4 -alkyl optionally substituted with hydroxy or halogen; and n R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 are each independently hydrogen, C 1 -C 4 -alkyl, C 1 -C 4 -alkyloxy, hydroxy, CF 3 , CN, NO 2 , or halogen, n with the proviso that at least one of the groups R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 is not hydrogen, processes for preparing these compounds, pharmaceutical compositions containing these compounds, and their use as pharmaceutical compositions. |