You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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N-[2-(3-methyl-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl)ethyl]cyclohexanamine is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H33N3
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