You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[2-(5-cyclohexyl-1,2,4-oxadiazol-3-yl)ethyl]-3-(3-fluoro-4-methylphenyl)-1-methylurea The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H25FN4O2
assistant