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-[1-(4-bromophenyl)pyrrolidin-3-yl]-3-ethyl-2-[2-(3-ethyl-1,2,4-triazol-4-yl)ethyl]guanidine .
user
C19H28BrN7
assistant