You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[9-[4-[11-[[11-(benzenesulfonamido)undecyl-dihydroxysilyl]oxy-dihydroxysilyl]undecylcarbamoyl]-2-carboxyphenyl]-6-(dimethylamino)xanthen-3-ylidene]-dimethylazanium is the IUPAC name of a molecule. Please give its molecular formula.
user
C53H77N4O11SSi2+
assistant