You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named methyl 3-[(1R,2R)-2-(4-chlorophenyl)-2'-oxospiro[cyclopropane-1,3'-indole]-1'-yl]-5-(2-oxo-1,3-oxazolidin-3-yl)benzoate is given. What is its corresponding molecular formula?
user
C27H21ClN2O5
assistant