You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as (2S,3S)-2-(1,3-dioxoisoindol-2-yl)-N-(4-fluoro-2-methylphenyl)-3-methylpentanamide using the IUPAC nomenclature.
user
C21H21FN2O3
assistant