You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[4-[(4-methylpiperazin-1-yl)methyl]cyclohexyl]-2-(6-pyrazin-2-ylcinnolin-3-yl)ethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H32N6O
assistant