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What is the molecular formula of the molecule (6R)-8-oxo-7-(pentanethioylamino)-3-[[1-(sulfomethyl)tetrazol-5-yl]sulfanylmethyl]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid ?
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C15H20N6O6S4
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