Biologically active derivatives ureido useful in treating multiple sclerosis.

USE IN THE PREPARATION OF A DRUG FOR USE IN MULTIPLE SCLEROSIS OF TREATMENT compound is a derivative of ureido of formula (I) wherein each of m and n, which are the same, is an integer of 1 A 3; AND EACH OF THE GROUPS R, which are the same, is a naphthyl group substituted with 1 to 3 sulfonic acid or a salt pharmaceutically acceptable.