You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 2-[(3R)-1,1-dioxo-2,3-dihydrothiophen-3-yl]-1-[(2R)-2-methyl-3,4-dihydro-2H-1,5-benzothiazepin-5-yl]ethanone using the IUPAC nomenclature.
user
C16H19NO3S2
assistant