You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule ethyl 2-[4-[[3-[4-(2-methoxyphenyl)piperazine-1-carbonyl]-4-methylphenyl]sulfonylmethyl]phenoxy]propanoate into molecular formula.
user
C31H36N2O7S
assistant