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 (2R)-2-[[2-(2-chloro-6-fluorophenyl)acetyl]-[(3-methylphenyl)methyl]amino]-N-(2-methylpropyl)propanamide .
user
C23H28ClFN2O2
assistant