14,16-Ethenobenzofuro[3',4':8,9,10]furo[3',4':4,5]cyclodeca[1,2,3-cd]furo[3,2-f]benzofuran-4,17-diol, 11-(3,5-dihydroxyphenyl)-1,5b,6,10,11,11c,12,16a-octahydro-1,6,10,12-tetrakis(4-hydroxyphenyl)- AIDS-135293 AIDS135293 Miyabenol B NSC634722