You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2R)-1-(2-methoxyethylamino)-1-oxopropan-2-yl] 3-(4-oxo-1-phenyl-5H-pyrazolo[3,4-d]pyrimidin-6-yl)propanoate is the IUPAC name of a molecule. Please give its molecular formula.
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C20H23N5O5
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