Try searching for...
SCFBio, IIT Delhi
Formula: C16H12O3 | Mol. Weight: 252.26 g/mol
IUPAC: 3-ethyl-1-hydroxyanthracene-9,10-dione
CCC1=CC2=C(C(=C1)O)C(=O)C3=CC=CC=C3C2=O