You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[5-[(4-methoxyphenyl)methyl]-1,3,4-oxadiazol-2-yl]sulfanyl]-N-(2-methylbutan-2-yl)propanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H25N3O3S
assistant