You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[2-[2-(4-fluorophenyl)-1,3-oxazol-4-yl]ethyl]-3-(1-hydroxy-2-methylpentan-2-yl)urea is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H24FN3O3
assistant