You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[(2-methyl-2,3-dihydro-1-benzofuran-7-yl)sulfonyl]-6,7-dihydro-4H-thieno[3,2-c]pyridine-4-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H17NO5S2
assistant