You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[(3-ethyl-1,2,4-oxadiazol-5-yl)methyl]-N-methyl-4-propan-2-ylsulfonylbenzamide into its molecular formula.
user
C16H21N3O4S
assistant