You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (6-methylpyridin-3-yl)-[(3R)-3-(4-methylsulfonyl-1H-pyrazol-5-yl)pyrrolidin-1-yl]methanone into its molecular formula.
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C15H18N4O3S
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