You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(3-methylcyclobutyl)-4-[6-(1-methylpyrazol-4-yl)pyrazolo[1,5-a]pyrazin-4-yl]pyrazol-3-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H20N8
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