The invention relates to compounds and their uses, particularly in thepharmaceutical and dietetic industries. The invention discloses complexeshaving Mn-SOD like activities, as well as methods for treating variousdiseases associated with oxidative stress, including cancer and inflammatoryconditions, by administering said compounds. It further deals withpharmaceutical compositions or dietetic products comprising said compounds,more particularly useful to treat various diseases or disorders, in particularuseful in the prevention or treatment of a disease involving an oxidativestress.