You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-(3-chlorophenyl)-1-[4-[(pyridin-3-ylmethylamino)methoxymethylamino]phenyl]sulfonylpiperidine-4-carbonitrile by IUPAC nomenclature, provide its molecular formula.
user
C26H28ClN5O3S
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