You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (4aS,10bS)-1'-(benzenesulfonyl)spiro[3,4,4a,10b-tetrahydro-2H-pyrano[3,2-c]chromene-5,4'-piperidine]-7-ol ?
user
C22H25NO5S
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