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 2-[2-(2,6-dioxopiperidin-1-yl)ethyl]-1-ethyl-3-[1-(5-methylpyridin-2-yl)piperidin-4-yl]guanidine ?
user
C21H32N6O2
assistant