You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[1-(5,6-dichloro-2-sulfanylidene-3H-benzimidazol-1-yl)-2-methylpropan-2-yl]methanesulfonamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C12H15Cl2N3O2S2
assistant