5,11,17,23,29,35,41-Heptaethyloctacyclo[37.3.1.1~3,7~.1~9,13~.1~15,19~.1~21,25~.1~27,31~.1~33,37~]nonatetraconta-1(43),3(49),4,6,9(48),10,12,15(47),16,18,21(46),22,24,27(45),28,30,33,34,36,39,41-henic\tosaene-43,44,45,46,47,48,49-heptol AIDS-135218 AIDS135218 NSC634599