You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[(2R)-1-[(3-fluorophenyl)methylamino]-1-oxopropan-2-yl]-4-pyridin-2-ylpiperazine-1-carboxamide into its molecular formula.
user
C20H24FN5O2
assistant