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system
Name the molecular formula for the molecule established as (3S,7aS)-7a-methyl-5-oxo-N-[4-(5,6,7,8-tetrahydronaphthalen-2-yl)-1,3-thiazol-2-yl]-2,3,6,7-tetrahydropyrrolo[2,1-b][1,3]thiazole-3-carboxamide using the IUPAC nomenclature.
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C21H23N3O2S2
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