You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (E)-3-[5-[(1-amino-2-methyl-1-oxopropan-2-yl)carbamoyl]-3-methylthiophen-2-yl]prop-2-enoic acid by IUPAC nomenclature, provide its molecular formula.
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C13H16N2O4S
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