You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[4-[(6-methylpyrazin-2-yl)methoxy]phenyl]-2-oxo-6-(trifluoromethyl)-1H-pyridine-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H15F3N4O3
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