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