You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[1-(2,4-dichlorophenyl)-4,5-dihydrothieno[2,3-g]indazol-3-yl]-[4-(methylamino)piperidin-1-yl]methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H22Cl2N4OS
assistant