A 13-year-old patient complains about gingival hemorrhage during tooth brushing. Objectively: gums around all the teeth are hyperemic and edematic, PMA index (papillary marginal alveolary index) is 46%, Greene-Vermillion hygiene index is 2,5. Provisional diagnosis: exacerbation of chronic generalized catarrhal gingivitis. This patient should be recommended to use a toothpaste with the following active component: