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 N-[(1S)-4-(2,6-dichloropurin-9-yl)-2,3-dihydroxycyclopentyl]carbamate is given. What is its corresponding molecular formula?
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C12H13Cl2N5O4
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