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system
Name the molecular formula for the molecule established as 2-[2-(hydroxymethyl)pyridin-1-ium-1-yl]-1-[4-[4-[2-[2-(hydroxymethyl)pyridin-1-ium-1-yl]acetyl]phenyl]phenyl]ethanone using the IUPAC nomenclature.
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C28H26N2O4+2
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