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 (2R,3S,4R,5R)-2-methyl-5-[4-(2-methylpropylamino)-3-phenylpyrazolo[3,4-d]pyrimidin-1-yl]oxolane-3,4-diol is given. What is its corresponding molecular formula?
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C20H25N5O3
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