You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[1-benzyl-5-(2-methylpropyl)-6,7-dihydro-4H-pyrazolo[4,3-c]pyridin-3-yl]-pyrrolidin-1-ylmethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H30N4O
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