You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 3-N-tert-butyl-2-isoquinolin-4-yl-6,7-dihydro-4H-pyrazolo[1,5-a]pyrazine-3,5-dicarboxamide .
user
C21H24N6O2
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