You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[[5-(2-fluorophenyl)-1,3,4-oxadiazol-2-yl]methyl]-2-methoxy-4,5-dimethylbenzenesulfonamide into its molecular formula.
user
C18H18FN3O4S
assistant