Try searching for...
SCFBio, IIT Delhi
Formula: C19H16O9 | Mol. Weight: 388.30 g/mol
IUPAC: (2S,3S,4S,5R,6S)-3,4,5-trihydroxy-6-(6-oxobenzo[c]chromen-3-yl)oxyoxane-2-carboxylic acid
C1=CC=C2C(=C1)C3=C(C=C(C=C3)OC4C(C(C(C(O4)C(=O)O)O)O)O)OC2=O