You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[[5-(6-propan-2-ylpyridazin-3-yl)-6,7-dihydro-4H-pyrazolo[1,5-a]pyrazin-2-yl]methyl]cyclopentanecarboxamide by IUPAC nomenclature, provide its molecular formula.
user
C20H28N6O
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