You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(4-methoxyphenyl)-3-[4-[3-(4-pyridin-4-ylpiperazin-1-yl)quinoxalin-6-yl]phenyl]propan-2-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C33H31N5O2
assistant