IUPAC:methyl (2S)-8,10'-dihydroxy-5,7-dimethoxy-4,9,9'-trioxo-4,4',9,9'-tetrahydro-3H,3'H-spiro[naphtho[2,3-b]furan-2,2'-pyrano[3,2-g]isochromene]-7'-carboxylate
IUPAC:methyl (2S)-8,10'-dihydroxy-5,7-dimethoxy-4,9,9'-trioxo-4,4',9,9'-tetrahydro-3H,3'H-spiro[naphtho[2,3-b]furan-2,2'-pyrano[3,2-g]isochromene]-7'-carboxylate