The present invention relates to new compounds of general formula 1
##STR00001## wherein X.sup.- and the groups A, B, R, R.sup.1, R.sup.2,
R.sup.3, R.sup.3', R.sup.4, R.sup.4', R.sup.x and R.sup.x' may have the
meanings given in the claims and in the specification, processes for
preparing them and their use as pharmaceutical compositions.