You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(1-benzofuran-2-carbonylamino)-4-(5-chloro-1-benzofuran-2-yl)thiophene-3-carboxylic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H12ClNO5S
assistant