You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[[7-hydroxy-2-(4-hydroxy-3-methoxyphenyl)-5-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-2H-chromen-3-yl]oxy]-6-methyloxane-3,4,5-triol into molecular formula.
user
C28H34O15
assistant