A PROCESS IS DISCLOSED IN WHICH AN N((4-OXO-4H-3,1BENZONXAZIN-2-YL) ACYLOXYMETHYL) LOWER FATTY ACID AMIDE IS PREPARED BY A REACTION OF AN ACID ANHYDRIDE WITH A SUBSTITUTED AMINOACETYL ANTHRANILIC ACID. THE REACTION PRODUCT IS THEN TREATED WITH A COMPOUND POSSESING AN ACTIVE HYDROGEN AND A NUCLEOPHILIC GROUP, I.E. AND AMINE, WHEREBY THERE IS FORMED A 2-CARBAMYL-ACETANILIDE IN WHICH ONE NUCLEOPHILIC GROUP ATTACHES TO THE METHYLENE RADICAL OF THE ACETYL GROUP AND ANOTHER TO THE CARBONYL GROUP OF THE ACETANILIDE. THE COMPOUNDS OF THE INVENTION ARE CENTRAL NERVOUS SYSTEM DEPRESSANTS, RESULTING IN A GENERALLY RELAXING OR SEDATIVE EFFECT.