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For the molecule named 4-[2-[(E)-2-[(4E)-4-[(2E)-2-[4,6-bis(4-sulfophenyl)thiopyran-2-ylidene]ethylidene]-3-[4-(carboxymethyl)phenyl]sulfanyl-2-bicyclo[3.2.1]oct-2-enyl]ethenyl]-6-phenylthiopyrylium-4-yl]benzenesulfonate by IUPAC nomenclature, provide its molecular formula.
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C54H42O11S6
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