6-Chloro-19-(2-piperazin-1-ylpyridin-4-yl)-14-oxa-2,4,8,23-tetraazatetracyclo[15.3.1.1(3,7).1(9,13)]tricosa-1(21),3(23),4,6,9(22),10,12,17,19-nonaene tris(trifluoroacetate)