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 1-ethyl-3-[2-(1H-indol-3-yl)ethyl]-2-[2-(8-methylimidazo[1,2-a]pyridin-2-yl)ethyl]guanidine .
user
C23H28N6
assistant