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 methyl 2-[2-[(4S)-1-methyl-6-oxo-5,7-dihydro-4H-pyrazolo[3,4-b]pyridin-4-yl]phenoxy]acetate is given. What is its corresponding molecular formula?
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C16H17N3O4
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