You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-(5-chloropyrazin-2-yl)-5-methyl-3,3a,4,5,6,6a-hexahydro-1H-cyclopenta[c]pyrrole .
user
C12H16ClN3
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