You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(1S,2R)-2-aminocyclopentyl]-1-[4-[methyl-(6-methylpyridazin-3-yl)amino]piperidin-1-yl]ethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H29N5O
assistant