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 2-[(2S)-2-(4-chlorophenyl)morpholin-4-yl]-N-methyl-N-[(1S)-1-thiophen-2-ylethyl]acetamide is given. What is its corresponding molecular formula?
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C19H23ClN2O2S
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