You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (5,5-dioxo-4-oxa-5lambda6-thiatricyclo[4.2.1.03,7]nonan-9-yl) 2,2-dimethylbutanoate .
user
C13H20O5S
assistant