You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(1S,3R)-1-propan-2-yl-3-sulfanylcyclopentyl]-[6-(trifluoromethyl)-2,4-dihydro-1,3-benzoxazin-3-yl]methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H22F3NO2S
assistant