You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(7-chloro-3,4-dihydro-2H-1,5-benzodioxepin-8-yl)-(1,1-dioxothiolan-3-yl)methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C14H15ClO5S
assistant