Try searching for...
SCFBio, IIT Delhi
Formula: C21H20O10 | Mol. Weight: 432.40 g/mol
IUPAC: 1,8-dihydroxy-3-methyl-2-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyanthracene-9,10-dione
CC1=CC2=C(C(=C1OC3C(C(C(C(O3)CO)O)O)O)O)C(=O)C4=C(C2=O)C=CC=C4O