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Name the molecular formula for the molecule established as 7-[[2-(2,5-dichlorophenyl)sulfanylacetyl]amino]-3-(hydroxymethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid using the IUPAC nomenclature.
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C16H14Cl2N2O5S2
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