You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 3-cyclopropyl-N-[[(2S,4S)-4-fluoro-1-[(3-methyl-1,2-oxazol-5-yl)methyl]pyrrolidin-2-yl]methyl]-3-methylbutanamide by IUPAC nomenclature, provide its molecular formula.
user
C18H28FN3O2
assistant