“…As one of the reasons of this search is the possibility of the development of resistance against existing drugs, it is not surprising that the researchers consider different classes of organic compounds. Promising results were demonstrated by the derivatives of adamantane 20 , 21 , 1,2,4-triazine [22] , terpenoids 23 , 24 , 25 , 26 , 27 , 28 , 29 .…”