You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule N-[2-(3,4-dimethoxyphenyl)ethyl]-4-[2-oxo-2-(4-phenylpiperazin-1-yl)ethoxy]benzenesulfonamide ?
user
C28H33N3O6S
assistant