You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
dipotassium;4-[2-[2-[4-chloro-3-[2-[2-(4-sulfonatobutoxy)ethoxy]ethoxy]phenoxy]ethoxy]ethoxy]butane-1-sulfonate is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H35ClK2O12S2
assistant