You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-fluoro-N-[(Z)-(5-methyl-3-oxo-2-phenyl-1H-pyrazol-4-yl)methylideneamino]benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H15FN4O2
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