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 1-[5-(2-amino-3-chloropyridin-4-yl)-3-(hydroxymethyl)-6-methylpyrazin-2-yl]-4-(aminomethyl)piperidine-4-carbonitrile .
user
C18H22ClN7O
assistant