You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 7-[3,3-dimethyl-2-(4-phenyliminobut-1-enyl)-5-sulfoindol-1-ium-1-yl]heptanoic acid into its molecular formula.
user
C27H33N2O5S+
assistant