IUPAC Name: 2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-8-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]chromen-4-one

Chemical Formula: C21H20O11

Exact Mass: 448.10 g/mol

Molecular Weight: 448.38 g/mol

Elemental Analysis: C, 56.25; H, 4.50; O, 39.25