You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (2S,3R,4S,5R)-2-(7-amino-4-methyl-1,2-dihydropyrazolo[4,3-d]pyrimidin-3-yl)-5-(hydroxymethyl)oxolane-3,4-diol by IUPAC nomenclature, provide its molecular formula.
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C11H17N5O4
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