You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (6S)-3-methyl-8-oxo-5-oxa-2lambda4,7-dithia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid into its molecular formula.
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C6H7NO4S2
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