You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-[2-[4-(4-chlorophenyl)piperazin-1-yl]-2-oxoethyl]-3-[3-(cyclopropylmethoxy)propyl]-2-methylguanidine into its molecular formula.
user
C21H32ClN5O2
assistant