You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-N-[(2S)-butan-2-yl]-2-[[2-(2-fluorophenyl)acetyl]-[(2-methylphenyl)methyl]amino]propanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H29FN2O2
assistant