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 3-[[2-[(5aR,8aR)-2,3,4,5a,6,7,8,8a-octahydrocyclopenta[b][1,4]oxazepin-5-yl]acetyl]amino]thiophene-2-carboxylate is given. What is its corresponding molecular formula?
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C16H22N2O4S
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