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system
Name the molecular formula for the molecule established as (3aR,4R,6aS)-2-benzyl-3'-ethyl-2'-methylspiro[1,3,3a,5,6,6a-hexahydrocyclopenta[c]pyrrole-4,5'-imidazole]-4'-one using the IUPAC nomenclature.
user
C19H25N3O
assistant