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-methylimidazol-2-yl)-[(2R)-2-[2-[(5-methylpyridin-2-yl)amino]pyrimidin-4-yl]pyrrolidin-1-yl]methanone is given. What is its corresponding molecular formula?
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C19H21N7O
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