17912-85-5 AIDS-142922 AIDS142922 Hopeaphenol NSC661748 {[6,6'-Bibenzo[6,7]cyclohepta[1,2,3-cd]benzofuran]-4,} 4',8,8', 10,10'-hexol, 1,1',6,6',7,7',11b,11'b-octahydro-1,1',7, 7'- tetrakis(4-hydroxyphenyl)-, {[1.alpha.,6.beta.(1'R*,6'S*,7'R*),} 7.alpha.\]-