You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (4-nitrophenyl)methyl (6R)-4-ethyl-3-methyl-8-oxo-5-thia-1,4-diazabicyclo[4.2.0]oct-2-ene-2-carboxylate by IUPAC nomenclature, provide its molecular formula.
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C16H17N3O5S
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