You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-[(2-chlorophenyl)methyl]-N-[4-[(4-fluorophenyl)methylcarbamoyl]phenyl]-6-oxopyridine-3-carboxamide into its molecular formula.
user
C27H21ClFN3O3
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