You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[2-(cyclopropylmethoxy)ethyl]-2-[[3-(2,2-difluoroethoxy)phenyl]methyl]-3-ethyl-1-methylguanidine is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H29F2N3O2
assistant