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system
Name the molecular formula for the molecule established as (2S,3S,8R)-N-(3,4-dimethylphenyl)-2'-oxospiro[1,2,5,6,7,8-hexahydropyrrolizine-3,3'-1H-indole]-2-carboxamide using the IUPAC nomenclature.
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C23H25N3O2
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