You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 5-[2-[(2S,6S)-2,6-dimethylmorpholin-4-yl]-2-oxoethyl]-1-(2,3-dimethylphenyl)pyrazolo[3,4-d]pyrimidin-4-one is given. What is its corresponding molecular formula?
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C21H25N5O3
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