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 tert-butyl (4R)-4-[[(2S)-2-hydroxy-2-thiophen-3-ylethyl]amino]azepane-1-carboxylate is given. What is its corresponding molecular formula?
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C17H28N2O3S
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