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 1-[(2R,4S)-2-(3,4-difluorophenyl)-4-hydroxypyrrolidin-1-yl]-3-(1,5-dimethylpyrazol-4-yl)propan-1-one is given. What is its corresponding molecular formula?
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C18H21F2N3O2
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