You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (2R,3R,4S,5R)-2-[6-[[(1R,2R)-2-[(3-chlorophenyl)methoxy]cyclopentyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol ?
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C22H26ClN5O5
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