You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 1-[4-[(4-fluorophenyl)methyl-[(3-methoxyphenyl)methyl]amino]-2-(piperazine-1-carbonyl)pyrrolidin-1-yl]ethanone .
user
C26H33FN4O3
assistant