You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[1-(4-amino-3-methylpyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-4-pyridin-2-ylisochromen-1-one;ethane is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H24N6O2
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