| abstract |
Compounds of general formula I wherein A represents a divalent residue selected from the group consisting of X¯ simple, negatively charged, anion, R is hydroxy, methyl, ethyl, -CF3, -CHF2 or a fluoro group, R1 and R2 are the same or different, -C1-C5- an alkyl group which, optionally, may be substituted by a -C3-C6-cycloalkyl, hydroxy or halogen group, or R1 and R2 together, a -C3-C5-alkylene bridge, R3, R4, R3 and R4, the same or different, hydrogen, -C1-C4-alkyl, -C1-C4-alkyloxy, hydroxy, -CF3, -CHF2, CN, NO2 or a halogen group. The application contains 11 more claims. |