You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 1-ethyl-2-[(4-methoxyphenyl)methyl]-3-[[2-(2,2,2-trifluoroethoxy)phenyl]methyl]guanidine is given. What is its corresponding molecular formula?
user
C20H24F3N3O2
assistant