You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named methyl (1S,2S,6S,7R,8R,9E)-4-ethoxy-9-ethylidene-11-(4-nitrophenyl)sulfonyl-3-oxa-11-azatricyclo[6.3.1.02,6]dodecane-7-carboxylate is given. What is its corresponding molecular formula?
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C22H28N2O8S
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