You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(6-fluoroindol-1-yl)-1-(3-methyl-1,1-dioxo-1,4-thiazepan-4-yl)ethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H19FN2O3S
assistant