You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [4-(2-methylpyrazol-3-yl)piperidin-1-yl]-(1-piperidin-3-ylpyrazol-3-yl)methanone by IUPAC nomenclature, provide its molecular formula.
user
C18H26N6O
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