You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[4-[2-[(4S)-4-(3-fluorophenyl)-6,7-dihydro-4H-thieno[3,2-c]pyridin-5-yl]acetyl]-1,4-diazepan-1-yl]-3,3-dimethylbutan-1-one by IUPAC nomenclature, provide its molecular formula.
user
C26H34FN3O2S
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