You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-chloro-6-ethoxy-N-[2-oxo-2-(1H-pyrazol-4-ylamino)ethyl]pyridine-2-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C13H14ClN5O3
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