You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 2,2,2-trichloro-N-[(3S,4S,5S)-7-chloro-3,4-dihydroxy-2,3,4,5-tetrahydro-1-benzoxepin-5-yl]acetamide by IUPAC nomenclature, provide its molecular formula.
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C12H11Cl4NO4
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