Try searching for...
SCFBio, IIT Delhi
Formula: C16H12O10S | Mol. Weight: 396.30 g/mol
IUPAC: [5,6-dihydroxy-2-(4-hydroxy-3-methoxyphenyl)-4-oxochromen-7-yl] hydrogen sulfate
COC1=C(C=CC(=C1)C2=CC(=O)C3=C(C(=C(C=C3O2)OS(=O)(=O)O)O)O)O