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What is the molecular formula of the compound with this IUPAC name 1-[(4-chloro-2,3,5,6-tetradeuteriophenyl)-dideuteriomethyl]-4,5,6,7-tetradeuterio-2-[(2,2,5,5-tetradeuteriopyrrolidin-1-yl)methyl]benzimidazole ?
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C19H20ClN3
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