111103-90-3 AIDS-094744 AIDS094744 Genkwanol A Spiro[benzofuran-2(3H),9'(8'H)-[2H]furo[2,3-h]-[1]benzopyran]-3-one,3',4'-dihydro-3',4,5',6-tetrahydroxy-2',8'-bis(4-hydroxyphenyl)-, (2R,2'R,3'S,8'R)-