You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(2-tert-butyl-5,7-dihydropyrrolo[3,4-d]pyrimidin-6-yl)-3-(3,4,5-trimethylpyrazol-1-yl)propan-1-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H27N5O
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