You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-(4-chlorophenyl)ethyl]-3-(6-chloropyridin-3-yl)-6,7-dihydro-5H-pyrrolo[2,1-c][1,2,4]triazole-5-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
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C19H17Cl2N5O
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