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 [(5S)-5-(4-chlorophenyl)-5-hydroxy-3-methyl-4H-pyrazol-1-yl]-(3-methylphenyl)methanone is given. What is its corresponding molecular formula?
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C18H17ClN2O2
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