You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[2-[(5-methyl-1,2-oxazol-3-yl)amino]-2-oxoethyl]sulfanyl-N-naphthalen-1-ylacetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H17N3O3S
assistant