Try searching for...
SCFBio, IIT Delhi
Formula: C31H24O7 | Mol. Weight: 508.50 g/mol
IUPAC: 1-(2,7-dihydroxy-4-methoxyphenanthren-1-yl)-4,6-dimethoxyphenanthrene-2,7-diol
COC1=C(C=C2C=CC3=C(C(=CC(=C3C2=C1)OC)O)C4=C5C=CC6=C(C5=C(C=C4O)OC)C=CC(=C6)O)O