IUPAC:3,3',4,9,10'-pentahydroxy-7-methoxy-7'-methyl-4',5,8,9'-tetrahydro-3H,3'H-spiro[naphtho[2,3-b]furan-2,2'-pyrano[3,2-g]isochromene]-5,8,9'-trione
IUPAC:3,3',4,9,10'-pentahydroxy-7-methoxy-7'-methyl-4',5,8,9'-tetrahydro-3H,3'H-spiro[naphtho[2,3-b]furan-2,2'-pyrano[3,2-g]isochromene]-5,8,9'-trione