You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named (3S)-1-[6-[2-(2-bromoanilino)-2-oxoethyl]sulfanylpyridazin-3-yl]-N-propylpiperidine-3-carboxamide is given. What is its corresponding molecular formula?
user
C21H26BrN5O2S
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