You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 5-[6-(3-chlorophenyl)-8-[hydroxy(oxan-4-yl)methyl]-7-[(4-methylcyclohexyl)methyl]purin-2-yl]-3H-1,3,4-oxadiazol-2-one by IUPAC nomenclature, provide its molecular formula.
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C27H31ClN6O4
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