You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3,3-diphenyl-1-[4-[phenyl-(3,4,5-trimethoxyphenyl)methyl]piperazin-1-yl]propan-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C35H38N2O4
assistant