Try searching for...
SCFBio, IIT Delhi
Formula: C29H22O6 | Mol. Weight: 466.50 g/mol
IUPAC: 1,3-dihydroxy-2-[(2-hydroxyphenyl)methyl]-4-(3-phenylpropanoyl)xanthen-9-one
C1=CC=C(C=C1)CCC(=O)C2=C(C(=C(C3=C2OC4=CC=CC=C4C3=O)O)CC5=CC=CC=C5O)O