IUPAC:methyl (2R,3R,3'R)-3',4,9,10'-tetrahydroxy-3-{[(2S,4R,5S,6S)-5-hydroxy-4-methoxy-6-methyloxan-2-yl]oxy}-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 (2R,3R,3'R)-3',4,9,10'-tetrahydroxy-3-{[(2S,4R,5S,6S)-5-hydroxy-4-methoxy-6-methyloxan-2-yl]oxy}-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