The present invention relates to new substituted pyrrolidinones of general
formula ##STR00001## wherein A, X, B and R.sup.1 to R.sup.9 are defined
as in claim 1, the tautomers, the enantiomers, the diastereomers, the
mixtures thereof and the salts thereof, particularly the physiologically
acceptable salts thereof with inorganic or organic acids or bases, which
have valuable properties.