You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(3,4-dihydroxyphenyl)-6-[2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-3,4-dihydro-2H-chromen-4-yl]-4-[2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-3,4-dihydro-2H-chromen-8-yl]-3,4-dihydro-2H-chromene-3,5,7-triol The above is the IUPAC name of a molecule. Write its molecular formula.
user
C45H38O18
assistant