A N-glycosylamide derivative of the formula (I) ##STR1## in which R.sup.1 denotes hydrogen or a saturated or mono- or polyunsaturated alkyl radical with one to 50 carbon atoms, R.sup.2 denotes hydrogen or a saturated or mono- or polyunsaturated alkyl radical with one to 50 carbon atoms, R.sup.3 denotes hydrogen or an acyl radical with up to 20 carbon atoms, R.sup.4 denotes hydrogen or an alkyl radical with up to 4 carbon atoms and R.sup.5 and R.sup.6 independently of one another denote hydrogen or an acyl radical with up to 10 carbon atoms or a saturated or an unsaturated alkyl radical or an aralkyl radical with up to 10 carbon atoms, or R.sup.5 l and R.sup.6 together denote a grouping ##STR2## wherein R.sup.7 and R.sup.8 independently of one another denote hydrogen or lower alkyl with up to 5 carbon atoms or an unsubstituted or substituted aryl radical with up to 10 C atoms in the aromatic part. The N-glycosylamide derivatives exhibiting a broad defense-increasing action in the body.