You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (2R,3S,4R,5R)-2-[2-(4-fluorophenyl)ethyl]-5-[6-[[(3R)-oxolan-3-yl]methyl]purin-9-yl]oxolane-3,4-diol into its molecular formula.
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C22H25FN4O4
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