A series of polycyclic 'cage'derivatives of N-geranyl-1, 2 diamines were synthesized and screened for their anti-mycobacterial activity against H37Rv, multidrug resistant (MDR) and extensively drug-resistant (XDR) strains of tuberculosis. By substituting the adamantyl skeleton of SQ109 with trishomocubanyl (9), oxa-pentacycloundecyl (14, 16), pentacycloundecyl, PCU,(10, 15) and azapentacycloundecyl (22, 23), the effect of other ...