Try searching for...
SCFBio, IIT Delhi
Formula: C21H20O9 | Mol. Weight: 416.40 g/mol
IUPAC: (2Z)-2-[(4-hydroxyphenyl)methylidene]-6-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-1-benzofuran-3-one
C1=CC(=CC=C1C=C2C(=O)C3=C(O2)C=C(C=C3)OC4C(C(C(C(O4)CO)O)O)O)O