You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as [6-(1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl)pyridazin-3-yl]methanamine using the IUPAC nomenclature.
user
C13H21N5
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