IUPAC:4,6,8',11'-tetrahydroxy-2,12'-bis(4-hydroxyphenyl)-2H-5',13'-dioxaspiro[1-benzofuran-3,3'-tricyclo[7.4.0.0^{2,6}]tridecane]-1',6',8'-trien-4'-one
IUPAC:4,6,8',11'-tetrahydroxy-2,12'-bis(4-hydroxyphenyl)-2H-5',13'-dioxaspiro[1-benzofuran-3,3'-tricyclo[7.4.0.0^{2,6}]tridecane]-1',6',8'-trien-4'-one