You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[4,6-di(butanoyl)-3,3-dimethyl-2-[3-[3,3,5-trimethyl-1-(3-sulfopropyl)indol-1-ium-2-yl]prop-2-enylidene]indol-1-yl]propane-1-sulfonic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C38H51N2O8S2+
assistant