You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(Z)-3-[1-[2-(3,4-dichlorophenyl)ethynyl]cyclopropyl]-2-fluoroprop-2-enoyl]piperazine-1-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
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C19H18Cl2FN3O2
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