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-(2-chloro-4-methoxyphenyl)ethyl]-2-methyl-3-[[4-(3-oxopiperazin-1-yl)phenyl]methyl]guanidine ?
user
C22H28ClN5O2
assistant