You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[1-[3,5-difluoro-4-(methanesulfonamido)phenyl]ethyl]-2-[3-(trifluoromethyl)phenoxy]-1,3-oxazole-4-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C20H16F5N3O5S
assistant