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 (2R)-2-[[1-(4-fluorophenyl)-4-oxo-5H-pyrazolo[3,4-d]pyrimidin-6-yl]sulfanyl]butanoate is given. What is its corresponding molecular formula?
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C16H15FN4O3S
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