You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[[4-(1-benzothiophen-7-ylsulfonyl)phenyl]methyl]thieno[2,3-c]pyridine-2-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C23H16N2O3S3
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