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system
Name the molecular formula for the molecule established as (1S,5R)-6-methyl-3-[2-[(6-methyl-1H-benzimidazol-2-yl)sulfanyl]acetyl]-3,6-diazabicyclo[3.2.2]nonan-7-one using the IUPAC nomenclature.
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C18H22N4O2S
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