You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[(4-bromophenyl)methyl-[2-(2-fluorophenoxy)acetyl]amino]-3-phenyl-N-propan-2-ylpropanamide by IUPAC nomenclature, provide its molecular formula.
user
C27H28BrFN2O3
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