You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 1-[2-(cyclohexen-1-yl)ethyl]-3-ethyl-2-[2-(4-pyrimidin-2-ylpiperazin-1-yl)ethyl]guanidine ?
user
C21H35N7
assistant