You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(5-chloro-2-methyl-2,3-dihydroindol-1-yl)-(1-methylsulfonylazetidin-3-yl)methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C14H17ClN2O3S
assistant