You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[3-(1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl)-1-cyclopropyl-5-methylpyrrolidin-3-yl]methanamine is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H32N4
assistant