You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [2-[[3-[(4-chlorophenyl)carbamoyl]-4,5,6,7-tetrahydro-1-benzothiophen-2-yl]amino]-2-oxoethyl] 1H-pyrazole-5-carboxylate into its molecular formula.
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C21H19ClN4O4S
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