You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule (2R)-2-[(2R)-2-hydroxy-2-thiophen-2-ylethyl]-N-(5-methylthiophen-2-yl)azepane-1-carboxamide into molecular formula.
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C18H24N2O2S2
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