The molecule is an organic heterotricyclic compound isolated from the fruiting bodies of the fungus Phellinus igniarius. It has a role as a fungal metabolite. It is an organic heterotricyclic compound, a polyphenol, an oxaspiro compound and a delta-lactone.
3-[5-[(E)-2-(3,4-dihydroxyphenyl)ethenyl]-5',6'-dihydroxy-3-oxospiro[furan-2,1'-indene]-2'-yl]-8,9-dihydroxypyrano[4,3-c]isochromene-1,6-dione