You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(5,5-dimethyl-7-oxo-4,6-dihydro-1,3-benzothiazol-2-yl)-2-(4-methoxyphenyl)sulfanylacetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H20N2O3S2
assistant