You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[6-[[(1S,3S)-3-[(5-methylsulfanylpyrimidin-2-yl)amino]cyclopentyl]amino]pyridin-1-ium-3-yl]pyridazin-3-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H22N7OS+
assistant