Try searching for...
SCFBio, IIT Delhi
Formula: C16H8O9 | Mol. Weight: 344.23 g/mol
IUPAC: 1,6,8-trihydroxy-9,10-dioxoanthracene-2,3-dicarboxylic acid
C1=C(C=C(C2=C1C(=O)C3=CC(=C(C(=C3C2=O)O)C(=O)O)C(=O)O)O)O