You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named (1S,2S)-2-(2-chlorophenyl)-N-[2-(cyclopropylmethyl)-4-methylpyrazol-3-yl]cyclopropane-1-carboxamide is given. What is its corresponding molecular formula?
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C18H20ClN3O
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