You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2,4-dichloro-N-[(1R)-1-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]ethyl]pyridine-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C14H9Cl3F3N3O
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