You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 6-[2-[(1E,3E,5E)-5-[1-[2-[2-(2-methoxyethoxy)ethoxy]ethyl]-5-methoxysulfonyl-3-(3-methoxysulfonylpropyl)-3-methylindol-2-ylidene]penta-1,3-dienyl]-3-methyl-5-sulfo-3-(3-sulfopropyl)indol-1-ium-1-yl]hexanoic acid by IUPAC nomenclature, provide its molecular formula.
user
C44H63N2O17S4+
assistant