111103-90-3 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)-, (2'R-(2'alpha,3'beta,8'alpha,9'alpha))-