You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named [(2R,3S,4S,5S)-5-acetyloxy-3,4-bis[(4-chlorobenzoyl)oxy]oxolan-2-yl]methyl 4-chlorobenzoate is given. What is its corresponding molecular formula?
user
C28H21Cl3O9
assistant