You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl 4-[[4-ethoxy-1-[4-(2-fluorophenyl)phenyl]-4-oxobutan-2-yl]amino]-4-oxobutanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H26FNO5
assistant