5,17,29-Tritert-butyl-38,40,42-trimethoxyheptacyclo[31.3.1.1~3,7~.1~9,13~.1~15,19~.1~21,25~.1~27,31~]dotetraconta-1(37),3(42),4,6,9(41),10,12,15(40),16,18,21(39),22,24,27(38),28,30,33,35-octadecaene-3\t7,39,41-triol AIDS-148042 AIDS148042 NSC679193