You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (5R)-6-(1-hydroxyethyl)-7-oxo-3-phenylsulfanyl-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid by IUPAC nomenclature, provide its molecular formula.
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C14H13NO4S2
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