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,5S)-5-(2,4-diamino-5-chloropyrrolo[2,3-d]pyrimidin-7-yl)-2-(hydroxymethyl)oxolan-3-ol by IUPAC nomenclature, provide its molecular formula.
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C11H14ClN5O3
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