You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 1-(4-chlorophenyl)-2-[3-[(2,6-difluorophenyl)methoxy]pyridin-2-yl]-1-methylguanidine ?
user
C20H17ClF2N4O
assistant