You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[2-(4-chlorophenyl)sulfanylethyl]-3-[2-(3-ethyl-1,2,4-triazol-4-yl)ethyl]-2-(furan-2-ylmethyl)guanidine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H25ClN6OS
assistant