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system
Name the molecular formula for the molecule established as 2-(1,3-benzodioxol-5-yl)-1-(6-methoxy-1,1-dioxospiro[2,4-dihydro-1lambda6,2,4-benzothiadiazine-3,4'-piperidine]-1'-yl)ethanone using the IUPAC nomenclature.
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C21H23N3O6S
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