You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[5,6-dichloro-2-[3-(5-chloro-3-ethyl-1,3-benzoxazol-3-ium-2-yl)prop-2-enylidene]-3-ethylbenzimidazol-1-yl]propane-1-sulfonic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H25Cl3N3O4S+
assistant