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 N-(4,4-dimethyl-2-oxooxan-3-yl)-4-oxo-2,5-dihydropyrazolo[3,4-d]pyrimidine-3-carboxamide ?
user
C13H15N5O4
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