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

SMILES: COC(=O)c1cc2cc3CC[C@]4(Cc5c(O4)c(O)c4C(=O)C(OC)=CC(=O)c4c5O)Oc3c(O)c2c(=O)o1