You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named [3-(2-methylpyridin-4-yl)oxyazetidin-1-yl]-(1,3,5-trimethylpyrazol-4-yl)methanone by IUPAC nomenclature, provide its molecular formula.
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C16H20N4O2
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