You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 4-[(4-chlorophenyl)methyl]-N-[2-(4-ethylpiperazin-1-yl)ethyl]thieno[3,2-b]pyrrole-5-carboxamide into its molecular formula.
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C22H27ClN4OS
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