You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2R)-N-[(2S)-butan-2-yl]-2-[[2-(2-fluorophenoxy)acetyl]-[(3-methylphenyl)methyl]amino]propanamide by IUPAC nomenclature, provide its molecular formula.
user
C23H29FN2O3
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