You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(4-methoxyphenyl)methylsulfanyl]-N-[[3-(4-methoxyphenyl)-1,2,4-oxadiazol-5-yl]methyl]-N-methylacetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H23N3O4S
assistant