You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2R,3S,4R,5R)-5-(6-aminopurin-9-yl)-2-[2-[dimethyl(methylidene)-lambda5-phosphanyl]ethyl]-4-methyloxolan-3-ol into molecular formula.
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C15H24N5O2P
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