You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(3-amino-6-pyridin-3-ylpyridin-2-yl)-3,4,6,7,8,8a-hexahydro-1H-pyrrolo[1,2-a]pyrazine-2-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H22N6O
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