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 5-chloro-N-[3-(ethylcarbamoyl)-4,5,6,7-tetrahydro-1-benzothiophen-2-yl]-2-prop-2-enylsulfanylpyrimidine-4-carboxamide is given. What is its corresponding molecular formula?
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C19H21ClN4O2S2
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