You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3aR,6aS)-N-(6-methylpyridazin-3-yl)-1,2,3,3a,4,5,6,6a-octahydrocyclopenta[c]pyrrol-5-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C12H18N4
assistant