Try searching for...
SCFBio, IIT Delhi
Formula: C21H20O11 | Mol. Weight: 448.40 g/mol
IUPAC: 4,5-dihydroxy-3-(4-hydroxyphenyl)-7-[(2S,5S)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxychromen-2-one
C1=CC(=CC=C1C2=C(C3=C(C=C(C=C3OC2=O)OC4C(C(C(C(O4)CO)O)O)O)O)O)O