You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 2-[2-[2-[3-[2-[3-(1-carboxyethyl)-4-methyl-5-(2-methylnaphthalen-1-yl)benzo[g][1,3]benzothiazol-3-ium-2-yl]ethenyl]-5,5-dimethylcyclohex-2-en-1-ylidene]ethylidene]-4-methyl-5-(2-methylnaphthalen-1-yl)benzo[g][1,3]benzothiazol-3-yl]propanoic acid by IUPAC nomenclature, provide its molecular formula.
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C64H57N2O4S2+
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