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 (2S,3S)-2-[[2-[(5-chlorothiophen-2-yl)methyl-methylamino]-2-oxoethyl]amino]-3-methylpentanoic acid is given. What is its corresponding molecular formula?
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C14H21ClN2O3S
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