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system
Name the molecular formula for the molecule established as benzhydryl (3E,6R)-3-(acetyloxymethylidene)-8-oxo-7-[(2-phenylacetyl)amino]-5-thia-1-azabicyclo[4.2.0]octane-2-carboxylate using the IUPAC nomenclature.
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C31H28N2O6S
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