[3,4'-Bibenzofuran]-6,6'-diol,3'-(3,5-dihydroxyphenyl)-4-[4-(3,5-dihydroxyphenyl)tetrahydro-2,5-bis(4-hydroxyphenyl)-3-furanyl]-2,2',3,3'-tetrahydro-2,2'-bis(4-hydroxyphenyl)-,[2S-[2a,3a[2R*,3R*(2'S*,3'S*)],4a,5b]]-