You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named N-benzyl-4-methoxy-N-[2-oxo-2-[4-[3-(trifluoromethyl)phenyl]piperazin-1-yl]ethyl]benzenesulfonamide is given. What is its corresponding molecular formula?
user
C27H28F3N3O4S
assistant