2,6,11,15,20,24-Hexathia-8,9,17,18,26,27-hexaazatetracyclo[23.2.2.2~7,10~.2~16,19~]tritriaconta-1(27),7,9,16,18,25,28,30,32-nonaene AIDS-144056 AIDS144056 NSC666079