You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N'-(4-ethoxyphenyl)-N-[2-(4-naphthalen-2-ylsulfonylpiperazin-1-yl)ethyl]oxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H30N4O5S
assistant