You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[1-[[4-(2-chlorophenyl)-1,3-thiazol-2-yl]amino]-1-oxobutan-2-yl] 4,5,6,7-tetrahydro-1-benzothiophene-2-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
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C22H21ClN2O3S2
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