Try searching for...
SCFBio, IIT Delhi
Formula: C18H14O5 | Mol. Weight: 310.30 g/mol
IUPAC: 5,11-dihydroxy-3,3-dimethylpyrano[3,2-a]xanthen-12-one
CC1(C=CC2=C(O1)C(=CC3=C2C(=O)C4=C(C=CC=C4O3)O)O)C