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system
Name the molecular formula for the molecule established as [(5aS,8aS)-1-[(3-methylphenyl)methyl]-2,3,4,5,5a,6,8,8a-octahydropyrrolo[3,4-b]azepin-7-yl]-cyclobutylmethanone using the IUPAC nomenclature.
user
C21H30N2O
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