You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by N-(5-chloropyridin-2-yl)-2-[3-[(Z)-1-(ethylideneamino)-2-formamidoethenyl]piperidin-1-yl]propanamide ?
user
C18H24ClN5O2
assistant