Thiazoline derivatives of the general formula I ##STR1## wherein R.sup.1 to R.sup.7 have the specified meanings, physiologically acceptable acid addition salts thereof, processes for their preparation, pharmaceutical preparations based on these compounds and their use for acting on the serum lipoprotein spectrum. The invention moreover relates to compounds of the formulae ##STR2## wherein A, R, R.sup.1 to R.sup.7, Y and Z have the specified meanings.