You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance [1-(4-chlorophenyl)-3-methylthieno[2,3-c]pyrazol-5-yl]-[4-(4-fluorophenyl)piperazin-1-yl]methanone .
user
C23H20ClFN4OS
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