You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule N-[2-[(5Z)-6-ethyl-5-prop-2-enylidene-4H-pyridin-3-yl]-2-imino-1-(3-methylcycloheptyl)ethyl]-2-methylhex-4-en-1-amine .
user
C27H43N3
assistant