You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl (3S)-2,2-dimethyl-4-(6,7,8,9-tetrahydrodibenzofuran-3-ylsulfonyl)thiomorpholine-3-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H31NO5S2
assistant