You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
8-[3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]-5,7-dihydroxy-2-(4-hydroxyphenyl)-6-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]chromen-4-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H28O14
assistant